- Testing proves a programmer's failure. Debugging is the programmer's vindication.
- —Boris Beizer
- Second law: The complexity barrier. Software complexity (and therefore that of bugs) grows to the limits of our ability to manage that complexity.
- —Boris Beizer
- First law: The pesticide paradox. Every method you use to prevent or find bugs leaves a residue of subtler bugs against which those methods are ineffective.
- —Boris Beizer
- Extra features were once considered desirable. We now recognize that "free" features are rarely free. Any increase in generality that does not contribute to reliability, modularity, maintainability, and robustness should be suspected.
- —Boris Beizer
- Programmers are responsible for software quality - quality in their own work, quality in the products that incorporate their work, and quality at the interfaces between components. Quality has never been and will never be tested in. The responsibility is both moral and professional.
- —Boris Beizer
- A design remedy that prevents bugs is always preferable to a test method that discovers them.
- —Boris Beizer
- A test that reveals a bug has succeeded, not failed.
- —Boris Beizer
- More than the act of testing, the act of designing tests is one of the best bug preventers known. The thinking that must be done to create a useful test can discover and eliminate bugs before they are coded - indeed, test-design thinking can discover and eliminate bugs at every stage in the creation of software, from conception to specification, to design, coding and the rest.
- —Boris Beizer
- Bugs lurk in corners and congregate at boundaries.
- —Boris Beizer
- In programming, it's often the buts in the specification that kill you.
- —Boris Beizer
- Forget that lone hacker image if you still cherish it. And if contemporary software engineering with its procedural structure bothers you, if the fast-tight algorithm is still the driving force in your designs - then get out! Find another domain, such as an R-and-D sandbox or an unreconstructed software shop, in which to play at programming.
- —Boris Beizer
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