If 1-in-4 think they're above average, what do the other 1-in-4 think?

So if there are four people in a room, then two of them would be above average, and two would be below average, yes?

I saw a commercial for Secret deodorant, and the profiled hairdresser indicated that she sweats more than the average woman. Then the man with the honey tone got on the voiceover and said "One in four women thinks they sweat more than average." Or something like that, but that's the gist.

So four people are in a room. Two of them sweat less than average. Two of them sweat more than average. One of them realizes they sweat more than average, thus buying Secret. What's with the other one who sweats more than average? That woman is skanchy, and doesn't realize it. It's your duty to buy her Secret. 25% of women are Skanchy, according to Secret.

Buy the Skanchy Woman some Secret. That way all the Skanchy Women sweat the way they're supposed to. And then take the other ones to the gym. Then buy them Secret, too.