Lik the tree falling in the forest," says Ira.
"Huh?"
"You know, the old question - if a tree falls in a forest and no one's there to hear it, does it really make a sound?"
Howie considers this. "Is it a pine forest, or oak?"
"What's the difference?"
"Oak is a much denser wood; it's more likely to be heard by someone on the freeway next to the forest where no one is.

Autore: Neal Shusterman