Guitar History

Ford or whomever 'invented' the car - but didn't really invent any particular aspect (as far as I know and I'm not going to google it), the inventor combined and updated those aspects
unless a Spaniard invented the idea of plucking a string over a piece of wood (and I don't think any Spaniard did), then what does it really mean to say they 'invented' the guitar?
If that's the standard (string over piece of wood). then there is no difference between a violin and a guitar, or a bass, or a sitar, or a balalaika. To me, is like saying so-and-so didn't invent the trumpet because ancient people were blowing on ram horns 1000's of years ago.