X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=lambda_evaluator.mdwn;h=a696537de5d30fcb7119588187fb1d67eb3de513;hp=7228fca7a6081714c2d874b53db032ff00f6be06;hb=8a17989a3112b0bdecfaaf7855f6b41f8f033476;hpb=8dd323ab2d93d590e51cfe30de3cb89d2840f175

diff --git a/lambda_evaluator.mdwn b/lambda_evaluator.mdwn
index 7228fca7..a696537d 100644
--- a/lambda_evaluator.mdwn
+++ b/lambda_evaluator.mdwn
@@ -8,7 +8,7 @@ It will allow you to write lambda terms and evaluate them, with full ability to
 *Lambda terms*: lambda terms are written with a backslash, thus: `((\x (\y x)) z)`.  
 If you click "Reduce", the system will produce a lambda term that is guaranteed to be reduction equivalent (`<~~>`) with the original term.  So `((\x (\y x)) z)` reduces to (a lambda term equivalent to) `(\y z)`.
 
-*Let*: in order to make building a more elaborate system easier, it is possible to define values using `let`.
+*Let*: in order to make building a more elaborate set of terms easier, it is possible to define values using `let`.
 In this toy system, `let`s should only be used at the beginning of a file.  If we have, for intance,
 
     let true = (\x (\y x)) in
@@ -16,7 +16,7 @@ In this toy system, `let`s should only be used at the beginning of a file.  If w
     ((true yes) no)
 
 the result is `yes`.  Things to watch out for: the expression after the equal sign must have balanced parentheses,
-and the "in" is obligatory.  The system will still produce a result, but it won't make much sense.
+and the "in" is obligatory.  If you violate these rules, the system will still produce a result, but it won't make much sense.
 
 *Abbreviations*, **NOT**: No abbreviations work.  So `\xy.yxx` must be written `(\x (\y ((y x) x)))`.  (As in Scheme or Racket.)