[SeanDav]

> Never, ever debug on live. If you can't recreate the problem locally, you don't understand the problem yet.

I am guessing you have not been exposed to highly complex live environments. What you say is largely true but you state it as an absolute fact, which is a bit naive. Live environments tend to be far more complex than test or local environments and sometimes that complexity is what creates the bug. Sometimes the only solution is to debug live, but of course that is a last resort.

[mattmanser]

For 99% of programmers who aren't ever going to deal with the really tricky problems, it should be gospel.

I'm not naive, I did actually say "almost always" and "There's a class of problems where this isn't necessarily true", but perhaps you can't read?