> You don't get to use evidence against your hypothesis as evidence for your hypothesis!
But you do. That's the point. It's not an absolute law. I'm sure you can find a great application written in Visual Basic. This doesn't make Visual Basic a great choice over Python.
If you could list 50+ successful startups running on Windows, then you could say there's a strong evidence.
And even then, this only proves that Windows is as good as Linux. It doesn't counter the original point about Linux being great despite not having a business model centered around IP.
I completely agree with your overall point - that open source Unix-type tools are better for startups, and that Windows-based tools aren't a good fit. I was simply saying that you used a rhetorical phrase incorrectly.
Put another way, when used correctly, "the exception that proves the rule" is a valid rhetorical phrase regardless of how many exceptions there are. Whereas if there were 500 successful startups using non-open-source tools, you wouldn't say that they were the exceptions that proved the rule.