Since I gave you the opportunity for you to highlight any case of misrepresentation, and you have declined to highlight it, I therefore conclude that I have not misrepresented your position.
I'm going to give you a second chance, however, because...
...when someone like McClellan, or Magruder, or Lee, is evaluating what will happen if they make a yes/no decision, they are considering two possibilities - what happens if they choose yes, and what happens if they choose no. At least one of those possibilities is always imaginary, because only one of them - at most - can ever happen.
So I'll say it once more - and this time, unless you specifically highlight where I have gone wrong, I'll assume I have correctly represented your opinion here.
In your opinion:
IF McClellan had broken through on the 7th of April,
THEN
INSTEAD of holding Yorktown (earning up to four weeks of extra time, for a cost of no more than 3,000 men)
Lee would have
NOT held Yorktown (costing up to four weeks of extra time, instead)
And would have EVACUATED (saving the men).
Is that correct?