Perhaps you are not aware that the vast majority of open source software does qualify as Free Software by the FSF's definition. Certainly BSD-licensed software does.
The vast majority of tools I used to learn how to program were not Free Software as defined by RMS.
But were OSS? An example, please?
BSD as it currently is(the "new" BSD licenses from 1999 on), because that's GPL compatible. The original BSD license does not count as FOSS as far as the FSF is concerned.
The original BSD license was free too, it was just not GPL compatible. The FSF has always recommended against it, but they have always called it a Free Software license.
I very much doubt that, since the definitions are very similar. Just because you could look at the source doesn't make it Open Source, as defined by the OSI.
Again, the vast majority of tools I used to learn how to program were not Free Software as defined by RMS.
I don't doubt that. I find it hard to believe they were Open Source.