Yes, and just because someone "reveals" that they haven't lied doesn't mean that he can't lie. Also, note that a lot of God's claims are non-falsifiable, so it's impossible to know he's not lying about those.
You have no reason to assume he's telling the truth other than you want him to be telling the truth. It's just wishful thinking. It doesn't mean he's lying, but you can't know it. Everything else you said was just shifting the goal posts away from me saying you can't know this. I mean, obviously you can't prove it. That's not the point; it's an unknowable claim, so Christians should stop making it. If they want to replace it with "I believe God only tells the truth", that'd at least be intellectually honest, but that certainly takes away all the punch from their claims.
You have no reason to assume he's telling the truth other than you want him to be telling the truth. It's just wishful thinking. It doesn't mean he's lying, but you can't know it. Everything else you said was just shifting the goal posts away from me saying you can't know this. I mean, obviously you can't prove it. That's not the point; it's an unknowable claim, so Christians should stop making it. If they want to replace it with "I believe God only tells the truth", that'd at least be intellectually honest, but that certainly takes away all the punch from their claims.