Does he 3bet 6543? 9654? 9543? 9764? 9753? 9875? 9xyz where xyz can even be a premium hand? On the other hand, does he sometimes flat 1-card draws (and does he do it with 7432 or 6543 or is it random)? Does he sometimes check flop or turn 1:2? Is he a luckbox donk who wins every pot no matter what you do?