Rules Analysis
Offsetting Fouls:
If accepted fouls are called by offensive and defensive players on the same play, these are offsetting fouls, and the disc must be returned to the last non-disputed thrower.
If there is non-minor contact that is caused by two or more opposing players moving towards a single point simultaneously, this must be treated as offsetting fouls.
Note:
There are times when both players have a right to a space and neither player can be deemed to have initiated contact. In these circumstances, if body contact occurs that affects the outcome of the play, this is to be treated as an Offsetting Foul (17.9.2). The disc shall be returned to the thrower (unless 17.9.2.1 applies).
Extra:
Minor contact may occur as two or more players move towards a single point simultaneously but this should not be considered a foul.
Players involved in these incidents should be mindful that they often do not have the best perspective on who initiated the contact and should ask nearby players for their perspective.
If two opposing players both cause non-dangerous contact by jumping to the same point simultaneously to catch a pass, but one player catches the pass before the contact occurs, the result of the play will stand. However if an offsetting foul is called, any players that had fallen over as a result of the contact will be able to stand up before play resumes.