This evenings conversation

"How old is the dog?"
"7 months"
"What's his name?"
"Rufus"
"He has very big paws, he is going to be massive."
"Actually the vet doesn't think he'll get much bigger as he is already 7 months old."
"Well, I don't think that vet knows what he is talking about."
"You're right. I don't think he knows what he is talking about. After all, he probably only went to vet school for 10 years, so he wouldn't know such things."

HOW STUPID CAN PEOPLE GET??? SINCE WHEN ARE YOU A VET OR SINCE WHEN DO YOU KNOW EVERYTHING ABOUT DOGS???