> Having immigrant intent is not a barrier to admission on a dual-intent visa. H-1s do not have to demonstrate that they have a "residence in a foreign country which he has no intention of abandoning" and "the H category is specifically excluded from the I.N.A. § 214(b)'s presumption of immigrant intent;" [1]

You are missing the point. Yes, H1Bs are excluded from presumption of immigrant intent. This doesn't mean that they can have immigrant intent. Instead, the law says (reiterating what I said in my previous comment) that "the fact that an alien is the beneficiary of an application for a preference status filed under section 1154 of this title or has otherwise sought permanent residence in the United States shall not constitute evidence of an intention to abandon a foreign residence for purposes of obtaining a visa as a nonimmigrant described in subparagraph (H)(i)(b) or (c), (L), or (V) of section 1101(a)(15) of this title or otherwise obtaining or maintaining the status of a nonimmigrant described in such subparagraph". Of course, in practice, since the government has few other means of proving immigrant intent, and since they cannot presume immigrant intent, this means that the obvious immigrant intent exhibited by applying for permanent residence must be ignored. This is why the CFR says that, because this is true in practical application of the law. My point is that it is true thanks to legal fiction, where the government is obligated to ignore the obvious evidence of immigrant intent, notwithstanding legislation otherwise demanding lack of immigrant intent.

> Also you can possess immigrant intent and even petition from non-intent status like TN, so long as you developed said intent after arrival, and once you take steps (I-485 for instance) you can’t renew.

Yes, I talk about this in my comment, let me helpfully quote it, in case you missed it:

> Before 1990 or so, as soon as you applied for a green card while on H1B, your visa (though not status) became effectively invalid. You couldn’t leave the country, because you’d be denied entry, given your immigration intent. You couldn’t also apply for extension of H1B visa for the same reason.

Observe that I explicitly say that this doesn't invalidate your status, only (effectively) your visa.

> Having your employer file I-140 doesn't because you didn't file it, your employer did.

This is incorrect, otherwise the legislation wouldn't need to say that "the fact that an alien is the beneficiary of an application for a preference status filed under section 1154 (...) shall not constitute evidence of an intention to abandon a foreign residence".

> This is basically all wrong.

Nothing I said is wrong, and nothing what you said has contradicted what I said (except where you were wrong). You are just talking past me: I acknowledge the practical reality of the consequences of the legislation and the ensuing CFR regulations (indeed, I am myself a beneficiary of the process, starting from a dual-intent L-1 visa). Instead, my point is that the law, instead of saying that "yes, it's totally kosher for for H1B holders to come here with immigrant intent", it schizophrenically says something like "no, you cannot have immigration intent on H1B, but unlike on, say, B1, you don't have to prove that you don't, and we will just pretend that your immigrant petition does not in any way show that you have an immigration intent (which, to reiterate, you shall not have)".