A policeman was interrogating three blondes who were training to become
detectives.  To test their skills in recognising a suspect, he showed the
first blonde a picture for five seconds and then hid it.

"This is your suspect, how would you recognise him?"

The blonde answers, "That's easy, we'll catch him fast because he only has
one eye!"

The policeman says, "Well...uh...that's because the picture shows his
profile."

Flustered by this ridiculous response, he flashes the picture for five
seconds at the second blonde and asks her, "This is your suspect, how would
you recognise him?"

The second blonde giggles, flips her hair and says, "Ha! He'd be too easy to
catch because he only has one ear!"

The policeman angrily responds, "What's the matter with you two?!?  Of
course only one eye and one ear are SHOWING because it's a picture of his
profile!!  Is that the best answer you can come up with?"

Extremely frustrated at this point, he shows the picture to the third blonde
and in a very testy voice asks, "This is your suspect, how would you
recognise him?"  He quickly adds, "...think hard before giving me a stupid
answer."

The blonde looks at the picture intently for a moment and says, "Hmmmm...the
suspect
wears contact lenses."  

The policeman is surprised because he really doesn't know himself if the
suspect wears contacts or not. "Well, that's an interesting answer... wait
here for a few minutes while I check his file and I'll get back to you on
that."

He leaves the room and goes to his office, checks the suspect's file in his
computer, and comes back with a beaming smile on his face. "Wow!  I can't
believe it... it's TRUE!  The suspect does in fact wear contact lenses.
Good work!  How were you able to make such an astute observation?"

"That's easy," the blonde replied.  "He can't wear regular glasses because
he only has one eye and one ear."