Nope. Just as an excuse to avoid my challenges:
1) How does something true become untrue?
2) How does the truth that on November 12, 2019 the moon was full become an untruth?
3) How about showing us an instance when a truth changes to a somewhat truth, or a kind of truth, or a partial truth, OR . . . . a non-truth.
Not that I expect a straight answer to any of these, but I'm willing to be surprised.
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The fact that you think you would be surprised by me not giving a straight answer is a little insulting. I don't think you are recognizing that I have given you a direct answer only it was not the one that you were expecting perhaps.
Here is a second effort that, no doubt, won't seem satisfying...
1)
Something true becomes untrue often when one learns new information or gains a new perspective
2)
That truth is dependent on local (tribal?) perspective and arbitrary standards (calendar). It is also a good example of an inconsequential fact that does not have any controversy to it because it is established in fairly universal standards of description. As such it makes for a poor example of other statements that are not so definable by universal standards yet are highly more consequential to those who find themselves at a disparity as to the truth or value of those statements. In this sense, your example is not representative of truth statements in such a way that it makes a convincing argument. I do grant that within the confines of arbitrary standards and the local perspective all known people (us Earthlings) it is an enduring truth...as trivial as it is.
3)
As I am sure you are aware of Newtonian mechanics seemed like a complete description of physical motion in a gravitational field until relativity and quantum mechanics was developed. Of course, the discovery of the latter didn't cause all the buildings built based on the former to suddenly collapse because Newtonian mechanics. This is because Newtonian mechanics is "true enough" within the practical parameters for human beings in their environment to have reliable architecture.
There are also countless examples of people who, with a passion, will tell themselves that something is true about another person and even go so far as to warn others..."don't trust him"..."that person isn't truthful"...etc. Only later they discover that because they were lied to by a trusted source or that they sincerely misunderstood something which normally would indicate a problem only in this case it was entirely misleading. Such occurrences happen with a high frequency as we pass through the world full of people and events and try to understand what we should and should not concern ourselves with and why. It is, perhaps, in this realm where truth is most changeable from one end of the true-false spectrum to the other.
If this doesn't work for you, I think we should agree to disagree. You can think you didn't get a fair answer and I will think that you were too biased to recognize the answer you were given.
By the way, keep up the posts showing hypocrisy in Christianity. I sincerely appreciate them.