"If two people say you are drunk, go to bed!"
In this situation, you can yell out “majority rules!”, as stated by Urban Dictionary:
In the same way, can also be used to prove or disprove facts (however ridiculous), in that if the majority agree that something is true/untrue then it is true/untrue - the 'rule' is thus useful for winning arguments where you know others will agree with you. Arguably pretty much just democracy distilled to the level of petty playground rivalry.