It does not look like you have scratched them, based purely on observing the pattern. There are no lateral scratch lines or such. The marks looked like they have been sandpapered off. If you have been dragging your toes on tarmac, you will also see scratches on the welt, which are absent in this case. Perhaps you have been too engrossed in playing twinky toes under the table during morning meeting with that lovely brunette from accounts.