@JeremyECrawford @mikemearls if a player tries to charm a creature immune to charm, would it guess that it is immune to it?

— Younes Kamal Eddine (@Younes_KE) March 25, 2016

If a spell fails to affect a target, you simply learn that the spell failed to affect it. #DnD https://t.co/IwyI2Ejis4

— Jeremy Crawford (@JeremyECrawford) April 1, 2016