[threatripper]

Did I really produce a Scotsman there? I would break it down like this:

* Professionals want to appear professional to the people who pay them.

* People who read the code can have an influence on the people who select which professional gets hired. (At least negatively if they find examples of poor practices.)

* Professionals therefore avoid any behavior that would be interpreted as unprofessional.

* Multiple question marks appear unprofessional and are therefore avoided. (Or would you concur???)

* I could not find a counterexample in my memory.

If this can be interpreted in a "no true Scotsman" way then it would be: "All Scotsmen who showed the behavior have been denied the citizenship." and then in turn they really wouldn't be true Scotsmen anymore because they lost the citizenship.

[hvdijk]

I think that last point illustrates the problem: you base your idea of "professional" on the professionals you have worked with or whose code you have read, who might not write such things. At the same time, in code I have read, I have seen it in ways that did not look out of place to me. What that tells me is that this is not a professional vs. unprofessional thing, it is just different programming norms. It is similar to how I think we can agree that neither tabs nor spaces are unprofessional, but insisting on either in a codebase already written using the other style is.

[detaro]

> Multiple question marks appear unprofessional and are therefore avoided.

Seems like a really weak assumption to me. Seen enough swear words etc in actual code bases, "???" in bug trackers, ... to think people would worry about the number of "?" they use in comments.