Do you know:
It's pretty easy to change the value represented by some numerical equate - even when they're built-in: 

Uses "console"

PrintL "True = " + IIf$(TRUE, "True", "False")

Memory_Set VarPtr TRUE, MKI$( FALSE )

PrintL "True = " + IIf$(TRUE, "True", "False")

WaitKey
Not recommended... but possible