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It bugs when I see serious comments about programming topics prefaced with something like, "I've been doing this for 10 years," followed by some ridiculously strongly stated opinion declared as an immutable fact.

Where do people get this confidence from? I've been professionally programming nearly 30 years at this point and I don't ever feel confident enough to assume I know *anything* for sure.

In fact, the older I get, the less sure I am and the more I've forgotten.