Some students asked what's the difference between the words,"rational","sensible" and "reasonable”?

It is a difficult question. These three words are very similar in meaning, and in many situations, they can mean almost the same thing, but there are some differences.

Today, I'll try to give you a simple answer.

“Rational”usually means based on clear thought and reason.Looking at facts in a very logical and intelligent way and making a decision based on knowledge. It's quite objective.“Sensible” means useful and practical.If you make a sensible decision,you think about how easy it is to do something, how suitable a decision or a suggestion is. Sensible involves how you feel about doing something, not just facts, so sensible is more subjective.“Reasonable” is fair or acceptable.So we often use reasonable when we're talking about making a deal or some kind of contract. Reasonable usually means it's fair to both sides maybe the seller and the buyer, both people in the discussion.

In sum,

Rational -a decision based on clear facts and objective knowledgeReasonable -when something is fair or acceptable.Sensible -when it just feels right.