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In this section of the site, we take questions submitted via email or other paths, and write them up for the benefit of all. If you have a question you'd like discussed, or a comment on these, please email editor@xprogramming.com.

Tradeoffs

Worst Things First vs User Priority,
XP vs Real World, and
Incremental vs Rewrite

Absence of Errors

Testing can only show the presence of errors, not their absence.
So how can testing ever give us confidence?

Quality Assurance

How does the conventional QA function fit into XP?

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