If you depend on a secret for your security, what do you do when the secret is discovered? If it is easy to change, like a cryptographic key, you do so. If it's hard to change, like a cryptographic system or an operating system, you're stuck. You will be vulnerable until you invest the time and money to design another system.

I can guarantee that back in the day, if a woman was left alone and she needed to eat, she would have to hunt. It's not biological imperative that says men have to ask us out; it's social conditioning. And we can change it.

While everyone would love to have that perfect portfolio of stocks that can be bought and held forever, it usually does not work out that way. Markets, technology, and businesses change too quickly to put portfolios on autopilot.

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