What goes into the "purity" of a truth? Are there impure truths?

Yes; A half-truth is a lie by omission.

For example, "Mom, there's a candy wrapper under (my brother)'s bed!" is a true statement, but the pure truth is "Mom, I ate a candy without permission and put the wrapper under (my brother)'s bed so he would be blamed for the missing candy!"

I am attempting to convey a lie by telling a truth and omitting details that would give context to that truth.

I believe you are referring to "whole truths," which yes we teach to children and swear on the stand in court. A "pure" truth carries different connotation here I think, and is not said in general.

Since GP might not have English as their first language (their post points out that they are European) I assumed the choice of "pure" was a translation of their language's equivalent to "whole" and therefore being treated as equivalent.

When you have the pure truth, why would you silently dismiss questions about your truth bot and not blast it 24/7?

Because right wingers cant handle criticsm. They dont want to correct, they want to silence their outgroups. Professionals would have at least replied with some meaningless PR text wall.

Typical, the far-left hacks swallowing anything the media presents to them always get an aneurysm should anyone dare to question their lies. Too bad.

Quick reminder: My reply wasnt about my swallowed believs, only about xAI response.

Your off topic ad hoc reaction is very typical for right wing internet products, thou.