Two Plot Problems

[dumbledore11214]

No: HPFGUIDX 187634

> Carol responds:
> As I've said before, I don't think it was the same spell. The cutting hex that Teen!Severus uses in OoP does no great damage and was certainly not Dark Magic beyond the power of Madam Pomfrey (or even, possibly, James himself) to heal. We don't hear any incantation, either; Severus apparently casts the hex nonverbally, so even if it was Sectumsempra, Remus could not have heard the incantation. But I don't think it was; I think that Sectumsempra, clearly labeled "for enemies," was invented after the SWM as retaliation. But Severus could not have used it at school without being expelled, and Lupin didn't know that Snape was a DE, so it could not have been his trademark spell. 

Alla:

But then if it is not the predecessor to Sectusemptra, why use the spell that cuts even if without great damage? I think it was an ancestor to the full blown Sectusemptra, so to speak, the one that was not fully developed yet.

Carol:
We're just dealing with yet another inconsistency here. 

Alla:

Not in my opinion, I think it is extremely consistent, I just do not see why in such important scene JKR would use a spell which has no meaning so to speak, while on the other hand as foreshadowing to Sectusemptra makes a lot of sense to me. IMO of course.