Truth and lies

Truths and lies, these are antonyms are they not? Not according to the dictionaries.

Truth is the antonym of lie, but lie is not the antonym of truth.

Whence cometh this unexpected asymmetry?

A perusal of Wikipedia reveals that this cesspit of crowdsourced information reveals no truths but it does weed out lies.

That is, it is an encyclopedia of widely shared beliefs, as opposed to individual beliefs.

Individual beliefs are not necessarily lies but they have a higher chance of being so than collective beliefs, by the very definition indeed.

The only real truth out there is that sometimes people tell absolute lies that they don’t believe in at all.