The law of non-contradiction (“LNC”) states that for any proposition “A,” A cannot be both true and false at the same time and in the same formal relation.
The existence of the LNC is the very basis of all argumentation, and anyone who denies it also denies meaning, order, truth and logic. For obvious reasons, therefore, it is not only useless but also affirmatively harmful to the search for truth to argue with someone who refuses to admit unambiguously the LNC. Arguing with a person who denies the basis for argument is self-defeating and can lead only to confusion. Only a fool or a charlatan denies the LNC, and this site will not be a platform from which fools and charlatans will be allowed to spew their noxious inanities.
For that reason, I am today announcing a new moderation policy at UD. At any time the moderator reserves the right to ask the following question to any person who would comment or continue to comment on this site: “Can the moon exist and not exist at the same time and in the same formal relation?” The answer to this question is either “yes” or “no.” If the person gives any answer other than the single word “no,” he or she will immediately be deemed not worth arguing with and therefore banned from this site.
We will start with Petrushka to demonstrate the application of the policy. Petrushka, can the moon exist and not exist at the same time and in the same formal relation?