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propositional logic, Boolean algebra, first-order logic. ⊥ {\displaystyle \bot } denotes a proposition that is always false. The symbol ⊥ may also refer to perpendicular lines. The proposition. ⊥ ∧ P {\displaystyle \bot \wedge P} is always false since at least one of the two is unconditionally false. ∀.
Paradox. A paradox is a logically self-contradictory statement or a statement that runs contrary to one's expectation. [ 1][ 2] It is a statement that, despite apparently valid reasoning from true or apparently true premises, leads to a seemingly self-contradictory or a logically unacceptable conclusion. [ 3][ 4] A paradox usually involves ...
List of lucky symbols. A keychain containing a four-leaf clover. A good luck charm is an amulet or other item that is believed to bring good luck. Almost any object can be used as a charm. Coins, horseshoes and buttons are examples, as are small objects given as gifts, due to the favorable associations they make.
Definitional retreat – changing the meaning of a word when an objection is raised. [22] Often paired with moving the goalposts (see below), as when an argument is challenged using a common definition of a term in the argument, and the arguer presents a different definition of the term and thereby demands different evidence to debunk the argument.
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
Pages in category "Logic symbols" The following 49 pages are in this category, out of 49 total. This list may not reflect recent changes. ..·. * List of logic symbols;
Glossary of mathematical symbols. A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various ...
Symbolic communication is the exchange of messages that change a priori expectation of events. Examples of this are modern communication technology and the exchange of information amongst animals. By referring to objects and ideas not present at the time of communication, a world of possibility is opened.