This guy is an unknown and I just sat at the table, so i have 16 hands on him and he's 42/24. Preflop is arguable but I think defending there is ok. Flop and turn bet is standard, but what's my line after he minraises? Call or shove are the only options in my mind, because I have no reason to believe that if I flat, villain should shove any river checked to (which, if he was any good, he should).
I have a two part question -
1) Is my thinking that flatting here is NEVER correct against an unknown?
2) Do you fold or shove?
Poker Stars $1/$2 No Limit Hold'em - 6 players
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UTG: $205.95
MP: $597.00
CO: $199.00
BTN: $219.50
SB: $228.20
Hero (BB): $200.00
Pre Flop: ($3.00) Hero is BB with 9

A
3 folds,
BTN raises to $6,
1 fold, Hero calls $4
Flop: ($13.00) T

A

9
(2 players)
Hero checks,
BTN bets $4,
Hero raises to $14, BTN calls $10
Turn: ($41.00) 5
(2 players)
Hero bets $38,
BTN raises to $76, Hero?