Deadpool: Ripley. From Alien 3.
Nega Sonic Teenage Warhead: Fuck you're old.
[Wade is using a bleach pen on his clothes to remove the blood]
Blind Al: Seltzer water and lemon for blood. Or wear red. Dumbass.
Deadpool: You're still here? It's over. Go home. Oh, you're expecting a teaser for Deadpool 2. Well, we don't have that kind of money. What are you expecting? Sam Jackson to show up? With an eye patch and saucy little leather number? Go. Go. Oh! But I can tell you one thing, and it's a bit of a secret. For the sequel, we're going to have Cable. Amazing character. Bionic arm, time travel. We have no idea who we're going to cast yet, but it could be anybody. Just need a big guy with a flat top. Mel Gibson. Dolph Lundgren. Keira Knightley. She's got range, who knows. Anyways, big secret. Shhh. Oh, and don't leave your garbage all lying around. It's a total dick move. Go.
Answer: Yes that would be how she most likely was able to tell.