I read something once that suggested there where christians who understood "sola" to mean something more akin to "solo" and was thinking about what then "sola" properly means in regard to sola fide, sola gratia, sola christos. etc, if there can be this 'variation' in how its understood. if one persons understanding (or misunderstanding) could be expressed better as "solo" what does "sola" properly mean, and what did those who first used it mean? Would it do any harm to make it more clear?