$ lua
Lua 5.3.3  Copyright (C) 1994-2016 Lua.org, PUC-Rio
> i = 1
> dir_fix = true
> print(dirfix and i<2 or i>2)
false
> i=3
> print(dirfix and i<2 or i>2)
true
> dir_fix = false
> print(dirfix and i<2 or i>2)
true
>