the three legged pig joke reminded me of a joke my dad once told me

a scientist was doing an experiment on a frog in his lab, he placed the frog down on the floor and said "Frog jump!". the frog jumped 4 feet and so he noted in his notebook

"frog with 4 legs, jumps 4 feet"

he then cut off one of the frogs legs and again said "Frog jump!". the frog jumped only 3 feet this time and so he noted in his notebook

"frog with 3 legs, jumps 3 feet"

he cut off a 2nd leg and said "Frog jump!". this time the frog only jumped 2 feet and so he noted

"frog with 2 legs, jumps 2 feet"

he then cut off a 3rd leg and again said "Frog jump!". the frog only jumped a foot and so he noted

"frog with 1 leg, jumps 1 foot"

the scientist then cut off the frogs last remaining leg and said "Frog jump!, Frog jump!, FROG JUMP!!!!!" but the frog did not move. so he noted

"frog with 0 legs, deaf"