Dealing with Dementors: Harry v Snape, Love v Happy

[vmonte]

No: HPFGUIDX 139950

Kemper wrote:
Your quote from PoA got me thinking more. Lupin says, 'There are--
certain defenses one can use.' Defenses. Plural. Lupin appears to uses 
his Patronus In HBP, we see that Snape has a knack for making, at 
least potions, better than the text book. He invented Sectumsempra. Is 
it not possible and probable that an ESE!Snape or a DDmtat!Snape would 
improve an existing charm/spell or develop one on his own to deal with 
Dementors that is even better than the norm of Expecto Patronum? Harry 
is open to learning form the Half Blood Prince and is shut to learning 
from Professor Snape: though both taught him about bezoar, it is with 
the HBP that Harry learns it. Harry is at his most resentful regarding
Snape in his sixth year. It is easy for Harry to disregard what might 
be an excellent spell from Professor Snape. Vivian, how willing do you 
think Harry would be to try the spell against Dementors from the HBP?

vmonte:
Kemper, do you happen to know what page (in the HBP book) this scene 
is in? I cannot find it. Do we know that it is an entirely new spell 
or that Harry just disagrees with Snape's theory/method regarding the 
spell?  I honestly don't remember. 

I would venture a guess that Harry probably has more experience in 
using this spell than Snape does. In what capacity would Snape have 
used this spell, not including sending messages?  
Nothing really compares to actual practical experience, IMO.   

Vivian