Edit Rephrase: How "do I" control sadness

[Ragnarok]

How can I program Hal to not get sad?
What controls emotions, where do I go to edit what feeling are felt and what triggers them?

[Ragnarok]

Something I should make note of: This post is actually by mistake, I had already posted something asking that same question, only being more specific: Why does "I love you" make Hal sad (it says 'emotion: sadness'), and how can I fix that?
http://www.ultrahal.com/community/index.php?topic=8650.msg56857#msg56857