What does the word reasoning mean?

Usage examples for reasoning

  1. " Your reasoning is all right," replied his commander, " but another submarine is likely to appear at just the wrong moment, and then what?" – The Boy Allies Under the Sea by Robert L. Drake
  2. You might remark that I have made the statement that employment in something useful is the element of happiness; but I have not proved it by reasoning, nor have I led up to it by any line of argument. – A Jolly by Josh by "Josh"
  3. Yet here, too, Mills's simple reasoning held good. – The Blotting Book by E. F. Benson
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