One thing that would not support the idea that Davis is a man of principles is a) He would lie for his own benefit.
A man of principles is one that have a moral code that he follows to ensure that peace and fairness is maintained.
Such people are not supposed to lie and if they do, it would be because others would benefit from it and not themselves.
Find out more on being principled at https://brainly.com/question/1326871.
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