Much of my doubt centers around the fact no creatures, living nor dead, have been produced.
I don't subscribe to fantastic tales, I believe in a flesh and blood creature. That said, they must occasionally suffer the unexpected demise, the sudden death. If they exist, they must leave physical remains.
Where the hell are those mortal remains?
It's enough to cause one to question the creature exists. I hold little patience for those claiming otherwise. Sorry, not gonna hold a seance with you.