Answer:
They take a vote and everyone has to agree with the theory that has the most votes.
Step-by-step explanation:
As we know that there are lot's of scientist those doing lot's of experiment to make the own theory in different field,but all are not getting success because every one is correct in own activity but this is not the case in real world.They have to prove that this is real theory but some of them could not prove that true.Like this when two scientist get disagree about their theory .To remove this disagreement ,they take a vote and everyone has to agree with the theory that has the most votes.