I wonder how this discussion might be dealt with in the 24th Century.
Captain Picard ~ "Now Crazy Eddie, don't be alarmed. I am going to describe to you an animal and I want you to tell me what you think it is." *clears throat* "This animal looks like a duck . . . . it WALKS like a duck . . . . and it also quacks like a duck. . . . Now Crazy Eddie, can you tell me what you think this animal is?"
Crazy Eddie ~ "Its a parrot!!!"
Captain Picard ~ "Hmmmm. Counselor Troi, Riker, Worf, any comments?"
Counselor Troi ~ "Clearly he's delusional Captain."
Riker ~ "Captain, why are we wasting our time with this man?"
Worf ~ " Sir, I suggest we beam him into a rock."