Forum:Monsters with ? attacks vs. Bottomless Trap Hole

So the other day, I was playing with my Fortune Lady Deck. I had summoned Fortune Lady Dark and my opponent had activated Bottomless Trap Hole. I argued that when it has a ? attack, and therefore, is considered to have 0 attack, and therefore, the trap cannot be activated. However, he argued that it has 2000 attack due to it's effect, and therefore, he could activate the trap, removing it from play. Can someone please clarify this for me? Thank you in advance.