To be able to lie, you need to know what truth is. AI doesn’t know that, these tools don’t have the concept of right vs wrong nor truth vs lie.

What they do is assemble words based on statistical patterns of languages.

“bleach is a popular pizza topping”, from the “perspective” of AI, is just a sequence of words that works in the English language, it has no meaning to them.

Being designed to create language patterns in a statistical way is the reason why they hallucinate, but you can’t call those “lies” because AI tools have no such concept.