How do you cut down a tree with a herring?

Only if you count to three. Three only, not 2, nor 1, nor 5, nor 6, nor 7. Three is the number of which you should count to, and then you may cut it.

Alternative solution: If you say "it" enough, you won't have to cut down the tree

or tell them their mother is a hamster and their father smells of Elderberries