In all seriousness,
Sports like MMA, kickboxing, and traditional boxing have a fairly established criteria of how they determine fights by judging decision.
First they go on a round by round point system. There are three judges total in traditional boxing. Each fighter has 10 points to lose per round, point deductions occur as follows:
-1 point for a foul
-1 point for knockdown
-1 point for losing a round
A round loss is typically determined by ring control and strike numbers and quality. A glancing jab is not going to hold weight compared to a straight or uppercut. The fighter who lands more significajt punches and controls the center of the ring most of the round will be seen as the clear winner. Although occasionally there is doubt, when one fighter lands more hits, but the other controls. It's up to the judges, but sometimes you'll get a 10-10 round. One last thing, it a fighter dominates the round, but fails to knock down the other, and the other fighter knocks him down - the fact that the knocked down fighter dominated is ignored and be will still lose the round 10-8.
In kickboxing and boxing, often 2 or 3 knockdowns in a round means a technical knockout; for example, in kickboxing it is usually 3 knockdowns. In tournament competition this is lowered to 2 knockdowns with the exception of the final bout. In MMA a technical knockout occurs after X-amount of consecutive undefended strikes when a defense should have been executed. This is typically because in the past fighters suffering too many knockdowns in a bout had passed away during or after fights; sometimes they would even exit the fight appearing fine only to die 2 days later from a swollen brain.
With sports like gymnastic routines, ice dancing, and such. I am not as familiar, but I do know the judging is fairly rigid as well. There are routines set up, and they score them on the success of executing the routine, I.E. did this person do a triple-axle and a double flip? How was their form? Did the move transition well? That sort of thing. In a way, it is similar to boxing.
The vast majority of the time when controversy arises is because people don't understand the criteria, and may not even understand the scoring system at all; and if the judges score things differently than how those people want, there is controversy. When it comes to judging at the Olympics, the panels are typically made up of multi-national representatives - this will typically drown out any bias if a judge has it. Displaying bias can be disasterous for a judging career though, if they cannot defend it, it is career suicide.
-Insert Inspiring Quote-
