Let's imagine for a moment that we live in a world of superheroes. DC Universe, since that's where Batman lives. So we live in a world with Superman, Batman, Wonder Woman, Green Lantern, the Flash, etc etc etc. Some of these people -- if "people" is the word -- have incredible, superhuman powers. Superman can lift enormous weights and fly. So can Wonder Woman. Green Lantern can make just about anything come out of that ring of his. Flash can run around the world in the time it takes to say it.

Some of these people, as we know from reading their comics, don't have super powers. Batman, Green Arrow, Robin, etc. But the people who share the DC Universe with them don't have access to the comics we read. And d'you think the non-powered folk make a point of announcing it? D'you think the general population of Gotham City knows that Batman is just a superb athlete in a leotard? Or are there urban legends, stories, myths? Batman has been operating for years, even in DC time. He must be more than just a guy in a leotard, right? He's still alive. So, at the very least, that suit must be more than a leotard. It must be, itself "super" in some way. (Always assuming Batman isn't -- and again, would he make a point of telling people that?)