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The 7 testing principles from ISTQB form the foundation of how I think about quality work. The first one is that testing shows the presence of defects, not their absence — no matter how thorough the testing, we can never guarantee the software is completely bug-free. We can only say "we haven't fou…

The 7 testing principles from ISTQB form the foundation of how I think about quality work. The first one is that testing shows the presence of defects, not their absence — no matter how thorough the testing, we can never guarantee the software is completely bug-free. We can only say "we haven't found any more bugs yet."