That's because “aught” can mean “everything,” or “zero.” In British English, it often means “all,” as in “for aught I know, football uses a round ball.” In the US, it more commonly means “nothing.” Garner's Modern American Usage says that was originally a mistake.

Does aught mean 0?

Aught can also be a noun meaning "zero," and "the aughts" is heard occasionally for the decade at the beginning of a century (say, 1900-1909 or 2000-2009) in which the penultimate digit is a zero.

Is aught another name for zero?

In English, "nought" and "naught" mean zero or nothingness, whereas "ought" and "aught" (the former in its noun sense) strictly speaking mean "all" or "anything", and are not names for the number 0. ... The words "nought" and "naught" are spelling variants.