Post making contest 3.0

Here be some hints:

1) Every single rule is at least somewhat meta. The same post may pass any one of the five rules now and fail later.
2) Once again I subscribe to the philosophy of "rules that conflict with each other" (aka hard to pass them both at the same time, while at least doable individually). Of particular note is rule 2 and how it is at odds with rule 4. Kieros seems to have figured out rule 4. Probably.
3) Rule 3 is a bit random and you probably shouldn't invest much time in working it out. Things will pass it every so often.
4) Rule 1 ranges from trivially easy to nearly impossibly hard to pass.