Does R1 score?

[SC Ump]

Originally Posted by JefferMC

5.5.C: No run shall be scored if a “fourth out” is the result of an appeal of a base missed or left to soon on a runner who has scored.

I can change the original post slightly and I think it will change your understanding of this rule.

With 1 out, R1 tags up properly on a fly ball caught by F8 and scores. R2 and R3 leave early. When an appeal is made on R3, R2 has also scored. The defense subsequently makes a "fourth out" appeal on R2.

Would you then cancel R1's score, even though he scored before the third out. I don't think so. I think the above rule means, as others have already said, that no run will be scored for the specific player that is appealed for the forth out. I does not seem to be referencing other runners that have properly scored on that same play.