Is it a sport?

My rule of thumb to determine this is, assume that the skill level of everyone involved becomes half, does anything change, if not it is a sport.

Usual sports are sports this way, Usain Bolt will run twice as slow but still he’ll be the fastest man on the track. Usual non-sport such as medicine will be non-sport, because half skilled doctors will kill twice more patients.

Though the definition will also include non-sport as sports, competitive programming will be a sport, so will be rankings of people in university, best paper awards, politics and so many other things, it does not matter much how good you actually are, but how good you are in comparison with others. Which means that you might be the best, but what you are be best amount might not be so good.