truth = objectivity = reality when we interact with the truth by looking at it and having it translated into our minds we have introduced subjectivity. so we can never make an objective truth claim due to our human nature. yes, in practice i do need water to survive and it's ok to say that this is the truth if we're just being pragmatic and not autists. but if we go into a deeper level then no, it's not the truth, that's just our perception of the world and it might be incorrect even if the chance is very low. we might be in a simulation or a dream or there might be other ways to survive without water we're not aware of. so the chance is never 100%.
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