Thinking about TYPE-CHECKING
    TEST-CHECK-SOME-COMMON-TYPES has expanded your awareness.
    TEST-GET-TYPE-WITH-TYPE-OF has expanded your awareness.
    TEST-TYPE-SETS-MAY-OVERLAP has expanded your awareness.
    TEST-INTEGERS-CAN-GET-REALLY-BIG has expanded your awareness.
    TEST-LISP-TYPE-SYSTEM-IS-HIERARCHY has expanded your awareness.
    TEST-SOME-TYPES-ARE-LISTS has expanded your awareness.
    TEST-TYPE-SPECIFIER-LISTS-ALSO-HAVE-HIERARCHY has expanded your awareness.
    TEST-TYPE-COERSION has expanded your awareness.
    TEST-ATOMS-ARE-ANYTHING-THATS-NOT-A-CONS has expanded your awareness.
    TEST-FUNCTIONP has expanded your awareness.
    TEST-THERE-ARE-SOME-OTHER-TYPE-PREDICATES has expanded your awareness.
    TEST-GUESS-THAT-TYPE! has expanded your awareness.