Some biological researcher experimented with a flea. He puts it on the table and says: Jump!

The flea jumps 3 meters, so he writes down to his log: The flea has jumped 3 meters.

Afterwards he cuts one of its legs off and says again: Jump!

The flea jumps only 2 meters, so he writes down to the log: The flea has jumped 2 meters.

Then he again cuts one more leg, again says: Jump!

It jumped 1.5 meters, which was also registered in the log.

He continued cutting the fleas legs until there were no legs left, he puts it on the table and says: Jump!

The flea doesnt move.

He says again: Jump!

It doesnt move.

So he writes down After removing all legs of the flea, the flea loses its ability to hear.