Well, sometimes things aren't really the way they appear, are they. Just like a story sometimes has another side to it. We're wise not to jump to conclusions too quickly, even when things seem pretty obvious to us.
Take this photo for example. I got outside fairly early this morning and made a few photos. Things certainly looked foggy, at least through the lens. Turns out that the warm humid air outside condensed on the lens as I brought the camera out of an air-conditioned room. In my hurry I didn't wait for it to get acclimatized. However, I thought the effect was neat so I decided to post this one.
(50mm f8 1/250 sec ISO200)
Just to show you that it was a beautiful clear day, however, I'll post this shot which was made minutes later - after I'd cleared the lens by holding it up to the sunlight.
(50mm f8 1/320 sec ISO200)