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An exercise that I suspect would help us answer the question, is to present a number of example usages of the words, some which declare the words' meaning in relation to other words, and then hear whether you think these sentences make sense to you:
"I was told that I would meet someone at the bridge. When I arrived, this turned out not to be true."
"You have your truth, and I have my truth."
"To lie is to say something which you know is not true. One can say something not true without lying if you believe it to be true."
"Major human conflicts are often due to one group believing that they have the truth."
"I can reasonably say that some of the things I believe are not true. If I knew which things though, I would not believe in them."
"The purpose of the scientific method is to get our understanding closer to truth."
"I was told that I would meet someone at the bridge. When I arrived, this turned out not to be true."
"You have your truth, and I have my truth."
"To lie is to say something which you know is not true. One can say something not true without lying if you believe it to be true."
"Major human conflicts are often due to one group believing that they have the truth."
"I can reasonably say that some of the things I believe are not true. If I knew which things though, I would not believe in them."
"The purpose of the scientific method is to get our understanding closer to truth."