Question mark
The rhetorical question mark or percontation point was invented by Henry Denham in the 1580s and was used at the end of a rhetorical question; however, its use died out in the 17th century. It was later revived in modern-day society by Matt DiRoberto. It was the reverse of an ordinary question mark, so that instead of the main opening pointing back into the sentence, it opened away from it. This character can be represented using the reversed question mark (⸮) found in Unicode as U+2E2E. The percontation point is analogous to the irony mark, but those are even more rarely seen.
Mark (Australian rules football)
Others claim that the origin of the mark comes from the traditional Aboriginal game of Marn Grook, which is said to possibly have influenced Tom Wills' writing of the laws of the game. It is claimed that in Marn Grook, jumping to catch the ball, called ""mumarki"", an Aboriginal word meaning "to catch", results in a free kick. Some counterclaim this theory as false etymology.