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.
Nuqta
Nuqtā (Hindi-Urdu नुक़्ता, نقطہ, from Arabic "nuqta" نقطة "dot," or "period."), also spelled Nuktā, is a term for a diacritic mark that was introduced in Devanāgari and some other Indian scripts to represent sounds not present in the original scripts. It takes the form of a dot placed below a character. Also, in another sense deriving from the Arabic script itself, there "are some letters in Urdu that share the same basic shape but differ in the placement of dots(s) or nuqta(s)" in the Urdu script: the letter ع "ain", with the addition of a nuqta, becomes the letter غ g͟hain.