From Jurassic Park:
"And Hammond's project," Malcolm said, "is another apparently simple system - animals within a zoo environment - that will eventually show unpredictable behavior."

You know this because of ..."

Theory," Malcolm said.

But hadn't you better see the island to see what he's actually done?"

"No. That is quite unncessary. The details don't matter. Theory tells me that the island will quickly proceed to behave in unpredictable fashion."

And you're confident of your theory."

"Oh, yes," Malcolm said. "Totally confident." He sat back in the chair. "There is a problem with that island. It is an accident waiting to happen."