Until now they hadn't known for certain that the dragons existed.

And you say these dragons exist only on this world?

"How long do you think a dragon could exist without magic?"

It's even harder to prove that this dragon does not exist.

There is no reason to believe this purported dragon exists.

Your animals look so real, like you've actually seen them up close, but of course that's impossible, since dragons exist only in stories.

Either dragons should exist' completely or fail to exist at all, he felt.

I must go now because we are expecting a dragon any minute although it does not exist really.

That's like saying dragons are undoubtedly red in colour but may not exist.