Truth vs Fact

Most languages have many different words which are identical in meaning. This is often historical: the words may have had different meanings at one time but have come to mean the same through usage or words may have been borrowed from other languages and have identical meanings to those already in the language. While 'truth' and 'fact' may sometimes imply the same thing, they are not identical. There is a distinction between 'factual truth' - "You are in India", "I am in the UK" are actually FACTS which I think I can safely say are TRUE (or 'have truth') at this moment in time - and various meanings of the same word which imply 'fidelity' or 'faithfulness' - "He shot an arrow straight and true", "The Pope's actions are true to his beliefs" and so on. The expression, "Blood is thicker than water" expresses a truth (that people who are related tend to favour each other before anyone else) rather than a fact ('thickness' in terms of liquidity is a somewhat variable thing). A 'fact' is always used to imply something that exists or has been done (the word comes from the Latin 'facere' = 'to do, make') and that can be independently verified. It can also mean something which is believed to be true or real - "The news report contained many unsubstantiated facts." - but, in this case, it is used with some irony. Facts, on their own, do not necessarily lead to the truth. Many people have been wrongly convicted of crimes on the evidence of facts and to say that the sky is blue is not really a true statement of fact: it is the refraction of the air which tends to scatter blue light more than other colours which causes it to appear blue.

truth = a verified or indisputable fact, proposition, principle, or the like: mathematical truths. fact = a truth known by actual experience or observation; something known to be true: Scientists gather facts about plant growth. Both definitions are from a dictionary. So your guess is as good as mine. I think the words are interchangeable.