If Mister Obama were to falsely claim that he attended, his cover story would say something like being a studious "monk" (unbelievable as he's not even that in the WH).
Anyone who has attended college will have many friends and acquaintances who would recall them. It's not all ust classroom, either. There are discussion groups, committees, social situations, and of course, casual conversation. And, in the classroom, students tend to sit in the same seat for every lecture and to know who normally sits near them. If Mister Obama were in your class or discussion group or on your committee, you would remember that he was.
I tend to think that this story is potentially huge. Ma and Pa Kettle might not understand Benghazi, and might not even worry about the IRS when if don't pay taxes, but they do understand (what appears to be) lying about college attendance and degrees.
Huge?
Quite possibly so.
.
Snopes are liberals and anything they claim is more or less useless.