Maxperson
Morkus from Orkus
But you are as it relates to 5e. 5e is not 3e, 2e, or 1e. THAC0 is not used in 5e, cantrips are unlimited in 5e, and INT does not map to IQ on an INT x 10 = IQ points basis in 5e.
It's common sense, though. A low int is a low int is low int. If you are going to play a 5 int PC as highly intelligent with a penalty you are doing it wrong. Yes, you can do it wrong, just like there is such a thing as dumb questions. The same goes if you play a 3 strength PC as a strongman, a 3 con PC as a healthy, hardy marathon runner, and so on. Stats mean things, as do the number put into them. Those things are more that just the bonus or penalty. The 5e rules even say that a low into PC has trouble reasoning.