What alternative is there to reason and logic? Logic is about self-consistency, and reason is about careful thinking with understanding of what follows from what. I don't see how you could do something besides that without it being nonsense in a very literal way.
Edit: Unless we're talking about art, feelings, the realm of aesthetic and things like that.
As I've mentioned in various previous threads, our morality has two sources ─ the evolved part and the acquired part.
We've evolved to have these moral tendencies ─ why? Because they're good for promoting tribal solidarity and cooperation, which have brought humans enormous benefits:
child nurture and protection
dislike of the one who harms
like of fairness and reciprocity
respect for authority
loyalty to the group
a sense of self-worth through self-denial
To which we can add our evolved conscience and our evolved capacity for empathy.
The rest of our morality is acquired from our upbringing, culture, education and experience. It deals very largely with how we should interact with others ─ older or younger, same or opposite sex, family or stranger, socially inferior or superior, and such things as dining together, observances like birth, coming of age, marriage and death, the rules of excretion and so on.
My point is that this system isn't the product of reason but of the evolutionary imperatives of surviving and breeding.
Reason only comes into it when we explore, describe and seek to explain our moral equipment, or how the rules should be applied in certain cases.
This is the background to the observation that "good" is what benefits or pleases me and mine and the causes I support; and "bad" is what is detrimental or displeasing to them ─ the 'me' here comes with the moral set-up above.
Of course our morality is only part of us. In the other corner are appetite, necessity, desire, ambition, competitiveness, obligation, social pressure, and other factors that demand our attention and need to be kept in balance.