TESU "special topics"

[vaticidalprophet]

I've been looking around the wiki and TESU's website, and have had trouble finding much about classes which transfer in as Special Topics. I'm aware this is a generalized term for 'things that TESU can't categorize well on their end', and that some subjects are known to transfer in as it. However, I've had trouble finding specific statements on a few things:

• Do Special Topics stack? If you take two 3cr classes that both transfer as, say, PSY-299 Special Topics in Psychology, do you get 6cr for two classes, or are you unable to transfer in the second one for credit?
  
• Do they ever count for specific required credits that don't require specific classes, e.g. the diversity class requirement? I've seen things that have made me think either way.
  

If there's any other information about them, that would also be great -- it's very tricky to figure out much more than the fact they're a generic term for a fairly diverse group of subjects.