From an exchange in one of the Facebook #paleontology groups:

"STOP. Is there really any compelling evidence that non-avian #dinosaurs (or any of them) had a #bird-like #respiratory system?"

[The answer is yes. Lots of comments explaining the evidence and linking to relevant journal articles.]

"STOP.
Can't touch this.
#Pneumaticity time."

Like Sokka, if I have nothing else to contribute, I can always add sarcasm and meat.