Am I missing some important fact about interning symbols in LISP?

Question

To be brief. Here is my several tries to intern and use a symbol in clisp.

 [1]> (setq sym (intern \"foo\"))
 |foo|
 [2]> (eq sym \'foo)
 NIL

Answer 1

Eval evaluates the form in the null lexical environment, i.e. with no lexical bindings. That has nothing to do with the interning of symbols.