Jim, you seem to refuse to understand the Vulcan mind. I cannot simply 'forget'.
As a Vulcan, every piece of memory is sacred knowledge, part of one's Katra, or 'soul' as you humans seem to put it.
You are asking me to forget that this, or any other following incident ever took place? I would never willingly forget anything that we have done together.

[That was logical... at least, for a Vulcan.]