Can a lifedebt be transferred?

[Brenda]

Luckdragon:
No canon here, just curiosity. If this is possible perhaps James 
transferred Snapes lifedebt to Harry; this would explain Snapes 
protectiveness of Harry while still seemingly hating him. This could 
also have played a part in why Harry survived the AK. If anyone could 
have interfered other than Lily it would have been Snape. Has this 
been discussed?