just saying 'it looks like a flush draw' doesnt make much sense unless you actually think about what hands he can have, you can't just say, 'he has spades', you have to think what spades are in his range that he isnt going to jam flop with, things like the aqss have overcards + spades, 79, 89, 9T, 9J all jam flop with pair + spades, 24, 23, 34 all jam flop with combo draw. the only real possible flush draw hands that he maybe wouldnt jam are jt, qt and qj. But shoving them over what looks like a 'im committed' turn bet wouldnt be the best play as opposed to jamming flop