rea·son·ing 
/ˈri:zn̩ɪŋ/ noun
/ˈri:zn̩ɪŋ/ noun [noncount] 1 : the process of thinking about something in a logical way in order to form a conclusion or judgment
▪ Could you explain your reasoning? ▪ They told everyone the reasoning behind the decision. ▪ a conclusion based on fallacious/flawed/false/sound reasoning ▪ scientific/logical/legal reasoning ▪ a method/mode/pattern of reasoning ▪ She chose to follow a particular line of reasoning. [=she chose to use a specific set of reasons in order to reach a conclusion] 2 : the ability of the mind to think and understand things in a logical way
▪ Humans possess the power of reasoning.
▪ Could you explain your reasoning? ▪ They told everyone the reasoning behind the decision. ▪ a conclusion based on fallacious/flawed/false/sound reasoning ▪ scientific/logical/legal reasoning ▪ a method/mode/pattern of reasoning ▪ She chose to follow a particular line of reasoning. [=she chose to use a specific set of reasons in order to reach a conclusion]
▪ Humans possess the power of reasoning.
