beaver

If a beaver builds a dam and floods a habitat forcing out the native species thats "natural". Humans do the same thing and it's "invasive".

Edit: Also, after you've seen a few crunches for no good reason, you just don't want to be all eager beaver and work overtime without having a sound reason up front. So I think that turns off employers as well...

I have a driveway that is an 1/8 of a mile long that is threatened by several beaver colonies trying to flood it out. Delivery drivers are terrified of my driveway because it has a reputation of eating their trucks.

By that definition, it's obvious why a beehive and beaver dam are "natural" and the Empire State Building is not. There is a degree to which this focus is arbitrary, but given that we are humans, it's sometimes a worthwhile focus to have.

Org/wiki/Busy_beaver function gives an upper bound on how long it can be. But yeah, the practical use is to tell you when a computation is already looping, for the large subset of infinite loops that result in states being repeated relatively quickly.

If "Walrus" is just an internal mnemonic, then engineering and marketing can both beaver away and eventually release "Anthem". Or whatever.

For example, one could recognize beavers as "small, four-legged furry rodents with big teeth and a flat tail", without having ever seen a beaver before. The training data for this classifier need not include beavers, but only images which match the individual attributes, not necessarily all in the same image -- small, four-legged, furry, rodent, big teeth, flat tail.

My favorite quote from this has to be Meanwhile our eager-beaver researcher, undismayed by logic-of-science considerations and relying blissfully on the “exactitude” of modern statistical hypothesis-testing, has produced a long publication list and been promoted to a full professorship. In terms of his contribution to the enduring body of psychological knowledge, he has done hardly anything.

For what it's worth, the beaver that forces out native species by flooding a habitat is both natural and invasive. Beavers are considered, by humans, to be a fairly invasive species, especially when introduced to areas they are not native to.