I posit this completely made up definition.

Shark is an adjunction of two words

Sharp; because, well look at them

and Ark; because they are boats.

Sharp-Ark > Shark

Isn’t language funny sometimes

Help! I was counting and somehow hit negative 15. Is there a bug?

You forgot to turn it off vibrate

The best way to validate an email address is to sent it an email validation link.

Anything outside of that is a waste of effort.