One of the easiest ways to see what you have for flooring is to do one of 2 things.
If you can find a heat/AC floor or wall vent/register, first remove it then look (or use a mirror to look) at the 'edge' of the flooring. If you remove a wall register, then hold a small mirror inside the duct and let it reflect back to you, thus, showing you what the 'end' of the flooring looks like.
Another way is to remove a transition strip that's installed in a doorway between 2 rooms. For example, look in the doorway between your kitchen and dining room to see if there's a strip of wood that's screwed to the floor. (Or look at another doorway between the kitchen and, say, the foyer. You should be able to see the end of the flooring that way too.
When you 'see what you can see', report back to us and describe it better. Do measure the thickness of the floor (NOT including any underlayments or sub-flooring; just the topmost flooring.) If you see 2 or 3 'thin' layers, it's NOT solid wood flooring.