hi,
  i'm porting some code from smalltalk and i receive a runtime error of this
type

argument of or: must be a block or variable


(or: is the method i'm implementing)

I pass to it a variable i suppose ( the number 0.2)

this is the code:

a _ FuzzyMagnitude new degree:0.7.
b _ FuzzyMagnitude new degree:0.20.
a and: b.
a and:  <- argument of and: must be a block or variable ->0.2.

(FuzzyMagnitude is an object that i have defined)
 advice,
  nelson
thanks for any
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