According to Catholicism can unaided reason know that every religion except Christianity is false?

According to Catholicism, can unaided reason know that every religion except Christianity is false? For example, if someone claimed that they are 95% sure Christianity is true and 5% sure some other religion is true (and let's say for the sake of argument this person is perfectly informed about both religions), would Catholicism tell them this is a reasonable belief to hold and the right way to think about things, or would they say no, there is enough information out there that if you actually know about that religion you would know with complete certainty that it is false?