While this particular post was not directed at me, I must say that as a skeptic, I have problems with using completely subjective "tests" in such a way as to imply that they are not subjective. What is reasonable to one person is not reasonable to another, and what is common sense to one person is not common sense to another. So, who's definition of reasonable is being used? Who's definition of common sense? If we're going by what the judicial system or government says is reasonable... Well, lets just say that I have very little confidence in the applicability of the definition, as judicial systems and governments are quite often completely unreasonable. Heck, the general population is quite often unreasonable. Take a look at some of the crazy laws that get passed (and subsequently upheld in court) if you want examples.
So when you throw "reasonable" into the mix, a subjective situation is being judged by subjective rules, and we have to hope and pray that the people enforcing those rules see them the same way someone else does. You do realize that is like asking a jury to agree on which shade of blue is the "bluest" just by looking at it, right?
"Reasonability" is at the heart of much common law and current legislation, for instance the test for a guilty verdict is often characterised as "beyond a reasonable doubt".