I've come across the expression: "Let me explain to you the rationale..."

My question is: in what context would you use it? Would you use it as a daily expression? or would you leave it for more formal conversations in more formal contexts (speech, work formal discussion)?

Thanks for clarifying.

  • I wouldn't say it's a particularly "formal" word - but you might want to avoid it if you think there's a possibility the person you're talking to might not be familiar with it. In which case reasoning / thinking or even plain reason might be more suitable, but if you have to assume you're talking to someone with a weak vocabulary you might as well just say Let me explain why. Sep 10, 2017 at 16:04
  • You say you’ve come across that expression before, but I couldn’t find many matches on Google. It’s not very common.
    – J.R.
    Sep 10, 2017 at 17:31
  • Thank you very much for your answer. @J.R. I was actually watching sport on TV when the referee mentioned that word to one of the players to explain his decision.
    – Juan
    Sep 10, 2017 at 19:21
  • @Juan - it makes sense in that context. You really should have mentioned that in your question. Contextual details matter quite a bit.
    – J.R.
    Sep 11, 2017 at 9:46

1 Answer 1


It's rarely used instead of reason or reasoning.

Let me explain to you the rationale.

Let me explain to you the reason.

Both are same but I'd like using reason to rationale

  • 1
    People might be inclined to say, “Let me explain why...” as well.
    – J.R.
    Sep 11, 2017 at 9:47
  • @J.R.Exactly =)
    – Fiv
    Sep 12, 2017 at 15:19

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