Is There a Cat in Here?

I did a session at bar camp 7 Portland. I brought a plastic bin of toys and asked the question Is there a cat in here? Talked and demoed how we would go about this. It is very slow to inspect each item and verify if it is a cat. First how would we know if we had a cat? We concluded that a cat had four legs, a head and fur. Took samples out of the bin and classified them into groups. Showed different types of classification trees, including discussion on red-black trees. Members of the group discussed their big data issues and sorts. Like coming up with an inspection criteria that allows you to make large cuts at the beginning and never look at that data again. We got thru 80% of the toys and concluded that there wasn’t a cat in the bin