A Black Dolphin is a piece of knowledge that is knowingly or unknowingly defended by someone who truly believes their stand even when it is certainly wrong.
Person 1: âI need 100 Black Dolphinsâ
Person 2: âItâs 100 black COFFINSâ
Person 1: âNo itâs notâ
Person 2: âI call Black dolphin, youâre wrongâ