All very valid stuff!

Strictly solo I see as meaning no support at all. This means to me no road support, no prior stashes of food, nothing apart from what you carry and what you can naturally get/catch on route e.g water

Solo Supported can mean road support and/or prior stashes

My take on it anyway.

Now along those lines and also relevant to Iain's thoughts on BG.

Onsight a term used in climbing is no prior practice or in running terms recce's. Would you consider if you know the area but have not recce'd the actual route an onsight attempt or not?