An interesting tidbit: can your programming language parse
a < b < c? Perl can’t. Ruby can, but returns an error “undefined method `>’ for false:FalseClass.” Interestingly, Python accepts it, and even gives the correct result. Something clever must be going on in the parser to make that work.
Update October 17: Although Lisp can’t parse the expression directly, it does correctly handle the equivalent S-expression
(< a b c).