Most of the time you should use reason, there is no doubt about that because gut often makes us susceptible to lots of different biases, particularly if what you're deciding is something that you really, that expertise can be brought to bear on it, there is a way in which you can align the odds, so then you should really use reason.
What ideal, immutable Platonic cloud could equal the beauty and perfection of any ordinary everyday cloud floating over, say, Tuba City, Arizona, on a hot day in June?