Scenario:
Bottom of extra inning in tie game
P1: out on fly ball to LF (1st out)
P2: gets on with clean single to RF
P2: steals 2nd base
P2: moves to 3rd base on Catcher error on throwing ball back to pitcher (next pitch)
P3: hits fly ball to CF (sac fly)
P2: scores on sac fly from P3 ---game over
The rules state that a scorer should reconstruct an inning without the errors to determine earned runs. In the above case, you can't construct the full inning because only one (1) out was recorded. P2 got to 2nd without an error. The sac-fly would have otherwise (a) moved him to 3rd, or he stays at 2nd. In either case, there would be two (2) outs. Even if you assume he moves to 3rd on the sac, you can't assume that he would score/not score afterwards, hence the question.
Thanks