What's the difference between a dolphin and a porpoise? It's not always straightforward.

It’s not fullproof (there are a few exceptions) but pretty much these’ll do it for you.

What’s the difference between a dolphin and a porpoise

I could never remember which was which and here is the way to remember it: when bulls attack they swipe up, and when bears attack they swipe down — just like their respective markets.

Bull market, bear market

The number of connections that your brain has to make to figure something out.

It seems like David Demaree may be the reference for this.

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Cognitive overhead