diff --git a/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.res b/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.res
index 9af9917d..61b5cd6b 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.res
@@ -150,7 +150,12 @@ let rec run = (~env, functionCallInfo: functionCallInfo): outputType => {
       ->E.R2.fmap(r => Float(r))
       ->OutputLocal.fromResult
     | ToScore(LogScore(answer, prior)) =>
-      GenericDist.Score.logScoreWithPointResolution(dist, answer, prior, ~toPointSetFn)
+      GenericDist.Score.logScoreWithPointResolution(
+        ~prediction=dist,
+        ~answer,
+        ~prior,
+        ~toPointSetFn,
+      )
       ->E.R2.fmap(r => Float(r))
       ->OutputLocal.fromResult
     | ToBool(IsNormalized) => dist->GenericDist.isNormalized->Bool
@@ -267,8 +272,12 @@ module Constructors = {
   let normalize = (~env, dist) => C.normalize(dist)->run(~env)->toDistR
   let isNormalized = (~env, dist) => C.isNormalized(dist)->run(~env)->toBoolR
   let klDivergence = (~env, dist1, dist2) => C.klDivergence(dist1, dist2)->run(~env)->toFloatR
-  let logScoreWithPointResolution = (~env, prediction, answer, prior) =>
-    C.logScoreWithPointResolution(prediction, answer, prior)->run(~env)->toFloatR
+  let logScoreWithPointResolution = (
+    ~env,
+    ~prediction: DistributionTypes.genericDist,
+    ~answer: float,
+    ~prior: option<DistributionTypes.genericDist>,
+  ) => C.logScoreWithPointResolution(~prediction, ~answer, ~prior)->run(~env)->toFloatR
   let toPointSet = (~env, dist) => C.toPointSet(dist)->run(~env)->toDistR
   let toSampleSet = (~env, dist, n) => C.toSampleSet(dist, n)->run(~env)->toDistR
   let fromSamples = (~env, xs) => C.fromSamples(xs)->run(~env)->toDistR
diff --git a/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.resi b/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.resi
index 7941489e..aa006c06 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.resi
+++ b/packages/squiggle-lang/src/rescript/Distributions/DistributionOperation.resi
@@ -65,9 +65,9 @@ module Constructors: {
   @genType
   let logScoreWithPointResolution: (
     ~env: env,
-    genericDist,
-    float,
-    option<genericDist>,
+    ~prediction: genericDist,
+    ~answer: float,
+    ~prior: option<genericDist>,
   ) => result<float, error>
   @genType
   let toPointSet: (~env: env, genericDist) => result<genericDist, error>
diff --git a/packages/squiggle-lang/src/rescript/Distributions/DistributionTypes.res b/packages/squiggle-lang/src/rescript/Distributions/DistributionTypes.res
index f377a616..2bb409ad 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/DistributionTypes.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/DistributionTypes.res
@@ -162,9 +162,9 @@ module Constructors = {
     let truncate = (dist, left, right): t => FromDist(ToDist(Truncate(left, right)), dist)
     let inspect = (dist): t => FromDist(ToDist(Inspect), dist)
     let klDivergence = (dist1, dist2): t => FromDist(ToScore(KLDivergence(dist2)), dist1)
-    let logScoreWithPointResolution = (prior, prediction, answer): t => FromDist(
-      ToScore(LogScore(prediction, answer)),
-      prior,
+    let logScoreWithPointResolution = (~prediction, ~answer, ~prior): t => FromDist(
+      ToScore(LogScore(answer, prior)),
+      prediction,
     )
     let scalePower = (dist, n): t => FromDist(ToDist(Scale(#Power, n)), dist)
     let scaleLogarithm = (dist, n): t => FromDist(ToDist(Scale(#Logarithm, n)), dist)
diff --git a/packages/squiggle-lang/src/rescript/Distributions/GenericDist.res b/packages/squiggle-lang/src/rescript/Distributions/GenericDist.res
index c2b03474..1df10240 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/GenericDist.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/GenericDist.res
@@ -68,18 +68,21 @@ module Score = {
   }
 
   let logScoreWithPointResolution = (
-    prediction,
-    answer,
-    prior,
+    ~prediction: DistributionTypes.genericDist,
+    ~answer: float,
+    ~prior: option<DistributionTypes.genericDist>,
     ~toPointSetFn: toPointSetFn,
   ): result<float, error> => {
     switch prior {
     | Some(prior') =>
-      E.R.merge(toPointSetFn(prior'), toPointSetFn(prediction))->E.R.bind(((a, b)) =>
+      E.R.merge(toPointSetFn(prior'), toPointSetFn(prediction))->E.R.bind(((
+        prior'',
+        prediction'',
+      )) =>
         PointSetDist.T.logScoreWithPointResolution(
-          b,
-          answer,
-          a->Some,
+          ~prediction=prediction'',
+          ~answer,
+          ~prior=prior''->Some,
         )->E.R2.errMap(x => DistributionTypes.OperationError(x))
       )
     | None =>
@@ -87,9 +90,9 @@ module Score = {
       ->toPointSetFn
       ->E.R.bind(x =>
         PointSetDist.T.logScoreWithPointResolution(
-          x,
-          answer,
-          None,
+          ~prediction=x,
+          ~answer,
+          ~prior=None,
         )->E.R2.errMap(x => DistributionTypes.OperationError(x))
       )
     }
diff --git a/packages/squiggle-lang/src/rescript/Distributions/GenericDist.resi b/packages/squiggle-lang/src/rescript/Distributions/GenericDist.resi
index ea9a4110..79fb54ab 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/GenericDist.resi
+++ b/packages/squiggle-lang/src/rescript/Distributions/GenericDist.resi
@@ -26,9 +26,9 @@ let toFloatOperation: (
 module Score: {
   let klDivergence: (t, t, ~toPointSetFn: toPointSetFn) => result<float, error>
   let logScoreWithPointResolution: (
-    t,
-    float,
-    option<t>,
+    ~prediction: t,
+    ~answer: float,
+    ~prior: option<t>,
     ~toPointSetFn: toPointSetFn,
   ) => result<float, error>
 }
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Continuous.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Continuous.res
index c1d87946..3661a531 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Continuous.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Continuous.res
@@ -279,7 +279,7 @@ module T = Dist({
     )
     newShape->E.R2.fmap(x => x->make->integralEndY)
   }
-  let logScoreWithPointResolution = (prediction: t, answer: float, prior: option<t>) => {
+  let logScoreWithPointResolution = (~prediction: t, ~answer: float, ~prior: option<t>) => {
     let priorPdf = prior->E.O2.fmap((shape, x) => XYShape.XtoY.linear(x, shape.xyShape))
     let predictionPdf = x => XYShape.XtoY.linear(x, prediction.xyShape)
     PointSetDist_Scoring.LogScoreWithPointResolution.score(~priorPdf, ~predictionPdf, ~answer)
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Discrete.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Discrete.res
index c0e3f3a8..fea5db6f 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Discrete.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Discrete.res
@@ -229,7 +229,7 @@ module T = Dist({
       answer,
     )->E.R2.fmap(integralEndY)
   }
-  let logScoreWithPointResolution = (prediction: t, answer: float, prior: option<t>) => {
+  let logScoreWithPointResolution = (~prediction: t, ~answer: float, ~prior: option<t>) => {
     Error(Operation.NotYetImplemented)
   }
 })
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Distributions.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Distributions.res
index f28b6369..2d0358ec 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Distributions.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Distributions.res
@@ -34,7 +34,11 @@ module type dist = {
   let mean: t => float
   let variance: t => float
   let klDivergence: (t, t) => result<float, Operation.Error.t>
-  let logScoreWithPointResolution: (t, float, option<t>) => result<float, Operation.Error.t>
+  let logScoreWithPointResolution: (
+    ~prediction: t,
+    ~answer: float,
+    ~prior: option<t>,
+  ) => result<float, Operation.Error.t>
 }
 
 module Dist = (T: dist) => {
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Mixed.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Mixed.res
index d3f09798..42a88909 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Mixed.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/Mixed.res
@@ -306,7 +306,7 @@ module T = Dist({
     let klContinuousPart = Continuous.T.klDivergence(prediction.continuous, answer.continuous)
     E.R.merge(klDiscretePart, klContinuousPart)->E.R2.fmap(t => fst(t) +. snd(t))
   }
-  let logScoreWithPointResolution = (prediction: t, answer: float, prior: option<t>) => {
+  let logScoreWithPointResolution = (~prediction: t, ~answer: float, ~prior: option<t>) => {
     Error(Operation.NotYetImplemented)
   }
 })
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist.res
index cdeaef5a..d21a7383 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist.res
@@ -203,11 +203,12 @@ module T = Dist({
     | (m1, m2) => Mixed.T.klDivergence(m1->toMixed, m2->toMixed)
     }
 
-  let logScoreWithPointResolution = (prediction: t, answer: float, prior: option<t>) => {
+  let logScoreWithPointResolution = (~prediction: t, ~answer: float, ~prior: option<t>) => {
     switch (prior, prediction) {
     | (Some(Continuous(t1)), Continuous(t2)) =>
-      Continuous.T.logScoreWithPointResolution(t2, answer, t1->Some)
-    | (None, Continuous(t2)) => Continuous.T.logScoreWithPointResolution(t2, answer, None)
+      Continuous.T.logScoreWithPointResolution(~prediction=t2, ~answer, ~prior=t1->Some)
+    | (None, Continuous(t2)) =>
+      Continuous.T.logScoreWithPointResolution(~prediction=t2, ~answer, ~prior=None)
     | _ => Error(Operation.NotYetImplemented)
     }
   }
diff --git a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist_Scoring.res b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist_Scoring.res
index bfc40071..532bc76c 100644
--- a/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist_Scoring.res
+++ b/packages/squiggle-lang/src/rescript/Distributions/PointSetDist/PointSetDist_Scoring.res
@@ -24,7 +24,7 @@ module LogScoreWithPointResolution = {
   ): result<float, Operation.Error.t> => {
     let numerator = answer->predictionPdf
     if numerator < 0.0 {
-      Operation.ComplexNumberError->Error
+      Operation.PdfInvalidError->Error
     } else if numerator == 0.0 {
       infinity->Ok
     } else {
diff --git a/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_GenericDistribution.res b/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_GenericDistribution.res
index 4021649f..0f29f9db 100644
--- a/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_GenericDistribution.res
+++ b/packages/squiggle-lang/src/rescript/ReducerInterface/ReducerInterface_GenericDistribution.res
@@ -162,24 +162,6 @@ module Helpers = {
       }
     }
   }
-  let constructNonNormalizedPointSet = (
-    ~supportOf: DistributionTypes.genericDist,
-    fn: float => float,
-    env: DistributionOperation.env,
-  ): DistributionTypes.genericDist => {
-    let cdf = x => toFloatFn(#Cdf(x), supportOf, ~env)
-    let leftEndpoint = cdf(MagicNumbers.Epsilon.ten)
-    let rightEndpoint = cdf(1.0 -. MagicNumbers.Epsilon.ten)
-    let xs = switch (leftEndpoint, rightEndpoint) {
-    | (Some(Float(a)), Some(Float(b))) =>
-      E.A.Floats.range(a, b, MagicNumbers.Environment.defaultXYPointLength)
-    | _ => []
-    }
-    {xs: xs, ys: E.A.fmap(fn, xs)}
-    ->Continuous.make
-    ->PointSetTypes.Continuous
-    ->DistributionTypes.PointSet
-  }
 
   let klDivergenceWithPrior = (
     prediction: DistributionTypes.genericDist,
diff --git a/packages/squiggle-lang/src/rescript/Utility/E.res b/packages/squiggle-lang/src/rescript/Utility/E.res
index 35439230..64729324 100644
--- a/packages/squiggle-lang/src/rescript/Utility/E.res
+++ b/packages/squiggle-lang/src/rescript/Utility/E.res
@@ -620,6 +620,7 @@ module A = {
       | Some(o) => o
       | None => []
       }
+    // REturns `None` there are no non-`None` elements
     let rec arrSomeToSomeArr = (optionals: array<option<'a>>): option<array<'a>> => {
       let optionals' = optionals->Belt.List.fromArray
       switch optionals' {
@@ -631,17 +632,7 @@ module A = {
         }
       }
     }
-    let rec firstSome = (optionals: array<option<'a>>): option<'a> => {
-      let optionals' = optionals->Belt.List.fromArray
-      switch optionals' {
-      | list{} => None
-      | list{x, ...xs} =>
-        switch x {
-        | Some(_) => x
-        | None => xs->Belt.List.toArray->firstSome
-        }
-      }
-    }
+    let firstSome = x => Belt.Array.getBy(x, O.isSome)
   }
 
   module R = {
diff --git a/packages/squiggle-lang/src/rescript/Utility/Operation.res b/packages/squiggle-lang/src/rescript/Utility/Operation.res
index cfa18925..3f56493b 100644
--- a/packages/squiggle-lang/src/rescript/Utility/Operation.res
+++ b/packages/squiggle-lang/src/rescript/Utility/Operation.res
@@ -55,7 +55,7 @@ type operationError =
   | ComplexNumberError
   | InfinityError
   | NegativeInfinityError
-  | LogicallyInconsistentPathwayError
+  | PdfInvalidError
   | NotYetImplemented // should be removed when `klDivergence` for mixed and discrete is implemented.
 
 @genType
@@ -69,7 +69,7 @@ module Error = {
     | ComplexNumberError => "Operation returned complex result"
     | InfinityError => "Operation returned positive infinity"
     | NegativeInfinityError => "Operation returned negative infinity"
-    | LogicallyInconsistentPathwayError => "This pathway should have been logically unreachable"
+    | PdfInvalidError => "This Pdf is invalid"
     | NotYetImplemented => "This pathway is not yet implemented"
     }
 }