Quote Originally Posted by seven-deuce View Post
Since I’m never folding he can only 5bet profitably against me with a hand that has >50% equity vs my calling range I think?
If you 4-bet, he basically has the options of calling, folding or 5-betting all-in (he could 5-bet to less than an all-in, but that's an inferior option with these bet sizes though I don't feel like proving it right now -- use the search function if you'd like to know more I guess).

You can't assume the bold here since Villain can't check. Since we can't really look at Villain's EV of calling a 4-bet without writing a short novel, check the EV of Villain's other two options and see when the EV of shoving is better than the EV of folding.

For an extreme counter-example to the bold, what if the pot was $1,000,000 and Villain had $1 behind. Would he prefer to shove with 32o (doesn't have 50%+ equity against your calling range) or fold?