Man with beard doing skateboarding stunt
A man with a goatee does a backflip on a skateboard.
There are lots of tricks that can be done on a skateboard, not just a backflip.  Also, the man could have a full beard and not just a goatee.
Not every beard is goatee, and every stunt includes backflip
Because the man has a beard, he cannot have a goatee.  Not all skateboarding stunts are a backflip.