Are you an Asker or a Guesser?

A brilliant web posting by Andrea Donderi on human nature:

"We are raised, the theory runs, in one of two cultures. In Ask culture, people grow up believing they can ask for anything – a favour, a pay rise– fully realising the answer may be no. In Guess culture, by contrast, you avoid "putting a request into words unless you're pretty sure the answer will be yes… A key skill is putting out delicate feelers. If you do this with enough subtlety, you won't have to make the request directly; you'll get an offer. Even then, the offer may be genuine or pro forma; it takes yet more skill and delicacy to discern whether you should accept."

Neither is "wrong", but when an Asker meets a Guesser, unpleasantness results. An Asker won't think it's rude to request two weeks in your spare room, but a Guess culture person will hear it as presumptuous and resent the agony involved in saying no. Your boss, asking for a project to be finished early, may be an overdemanding boor – or just an Asker, who's assuming you might decline. If you're a Guesser, you'll hear it as an expectation. This is a spectrum, not a dichotomy, and it explains cross-cultural awkwardnesses, too: Brits and Americans get discombobulated doing business in Japan, because it's a Guess culture, yet experience Russians as rude, because they're diehard Askers."

- Oliver Burkeman, The Guardian

Being a Guesser is "great for, say, reading nuanced and subtle novels; not so great for, say, dating and getting raises." - Donderi

So if you are a Guesser, what's the best way to say "No?"

1. "I'm afraid that won't be possible"
2. "Oh dear, I find I'm watching television that night" - Peter Cook
3. "I can't, because I'm unable to"
4. "No."
5. ??