So,

A TLGH that understands epistemology wouild see itself as not knowing its TLG, since "it was hardwired into me" is no justification.

So, it's no justification in this technical sense, and it might cheerfully agree that it doesn't "know" its TLG in this sense, but that's completely aside from the 100% certainty with which it holds it, a certainty which can be utterly unshakable by reason or argument.

I misunderstood what you were saying due to "justification" being a technical term, here. :)