What counts as cheating?

Could a prosthetic be a form of cheating?

And does the question of cheating even matter if everyone is cheating the same way.

Music Credits:

Memories of Thailand by Risey. License: https://creativecommons.org/licenses/by-nc/3.0/legalcode

“Air Hockey Saloon” by Chris Zabriskie; license https://creativecommons.org/licenses/...) Source: http://chriszabriskie.com/vendaface/ Artist: http://chriszabriskie.com/ Music promoted by Audio Library https://youtu.be/-NEsfl50G7s

Song links:

Memories of Thailand by Risey: http://freemusicarchive.org/music/Risey/Best_Bytes_Volume_1/02--Risey--Memories_Of_Thailand_Beat_Doctors_stuck_in_Britain_remix

Air Hockey Saloon: https://www.youtube.com/watch?v=-NEsfl50G7s