rate your language

Scalability:x/10;
Performance:x/10;
Ease of use:x/10;
verbosity:x/10;

>>39
So it's like Python!
a <= b is not c in d or e

>>43
It's better than in python, because It doesn't have to be a special case in the parser and it works for most, if not all ,transitive binary relations

>>44
But you can't write what I just wrote in Lisp without cluttering everything with parentheses.

>>45
What's your point? That's like saying you can't write anything sizeable in python without using indentation.
I prefer not to have to remember some arbitrary precedence rules, you on the other hand do.
Besides, I'm not even sure what your intended use case for that example is

>>43
a <= b is not c in d
Checking with the precedence table at http://docs.python.org/reference/expressions.html, I'd argue that such a statement is ambiguous and therefore Scheme is better as it isn't able to express such a statement

>>47
It's unambiguous. Read the paragraph directly above the table; those operators all chain from left to right.