Conceptual simplicity does not always mean shorter code. I strongly prefer (add1 x) to (+ x 1), despite the latter being fewer keystrokes.
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It's so hard to talk about probabilities. Casual conversation often conflates 'the likelihood of an event happening' with 'how strongly I believe in my assessment'.
For example, I'm very confident (say 90%) that the coin in my pocket is 50% likely to land on heads.
An underrated property of PHP: it strongly pushes you towards stateless code that leverages am external DB:
If you're interested in alternative approaches to computing, I strongly recommend exploring the ideas in the Tunes project.
There's a good overview here:

