eval decides he knows exactly where the problem lies and so turns the key and proudly proclaims, "Yup, this car is broken." But says no more.

grep decides he knows exactly where the problem lies and promptly replaces the entire unnamed engine block list with last week's copy of the Wall Street Journal proudly proclaiming, "sh$_ happens."

map decides he doesn't know squat and systematically iterates through @car calling various diagnostic and fixative subroutines thereby discovering an unmatched curly brace left behind in $AUTOLOAD when do borrowed the car last week.