How many of us are engineers ?

In some foreign country a priest, a lawyer and an engineer are about
to be guillotined. The priest puts his head on the block, they pull the
rope and nothing happens — he declares that he’s been saved by divine
intervention– so he’s let go . The lawyer is put on the block, and
again the rope doesn’t release the blade, he claims he can’t be executed
twice for the same crime and he is set free too. They grab the engineer
and shove his head into the guillotine, he looks up at the release
mechanism and says, “Wait a minute, I see your problem….”