Just paint cute plants and unicorns that you see.

What counts is not so-called knowledge of so-called unicorn facts, but vision, seeing. Seeing implies and is coupled with fantasy, and imagination.

Josef Albers, Unicorn symbol in art

Unicorn sightings are real

Have you any evidence for that? With error bars and everything?

There is a lingering debate over the two schools of hypothesis for the evidence underlying unicorn sightings.