The question is whether Open Source has always been synonymous with free, I do not believe it has I just believe it has historically been strongly correlated but I could be wrong. However using the OSI as evidence of the original meaning of the term doesn't strike me as at all authoritative, especially as the OSI has all sorts of conditions that I do not believe were in any original definition of the term.

as I am not a prescriptivist in language as a general rule it may be that I should alter my usage of the term to follow OSI usage, but then I feel that a useful term is needed for software where you can inspect the source as needed - perhaps inspectable source.