"The reason 2Brains doesn't lie and the reason it's cheap are the same reason. It looks the fact up instead of guessing it ..."
Then it is constrained by what it can look up. A search engine with a natural language interface, not AI.
The reason humans do not lie (except when they do) is because they have values, not because the world is a multiple choice test with a cheat sheet. Humans can show their work, this doesn't even do work, it isn't a solution to anything and a proper solution obviates the need. Why employ "reasoning" when all the answers already exist? Because they don't. But hey, we can see why this guy got out of the business, and with the big money got back in. Same shit, different day.
Also...
"It is the whole ballgame for enterprise AI."
No, it is not. The "hallucination problem" is a symptom of a grotesque failure of architecture, but the ballgame for enterprise AI is predicated on a lack of such failure. Fixing the "hallucination problem" means you're in the ballgame, not that you've won. AI companies aren't interested in fixing it, though, they're interested in a race to grab the cash. Enterprises need to wise up, these tools aren't being developed to do a good job but to make billionaires richer.