In the real world, it depends. With most people in practice, assuming they have enough of an understanding of me to know I am a skeptic on these things and are implicitly asking for one or the other, I give that. Therefore I normally give advice on faith.
I guess it's hard for me to understand what's irrational about advising them to eat the rice (as you indicated you would do). It seems like the only sane choice. I'm not sure exactly what you mean by "faith", but if advising people to eat the rice is based on it, then it must be compatible with rationality, right?
Right--choose the rice, assuming you (or they) want to live. That seems like the only sane choice, doesn't it?
Maybe this is a problem of terminology. You seem to be using the labels "faith" and "reason" in certain way...
I've raised arguments for philosophical scepticism before, which have mostly been argued against in a Popper-esque manner of arguing that even if we don't know anything with certainty, we can have legitimate knowledge on probabilities.
The problem with this, however, is how you answer a sceptic about the notion of probability having a correlation with reality. Probability depends upon axioms of probability- how are said axioms to be justified? It can't be by definition, or it has no correlation to reality.