## What does 3 equal signs mean?

A triple equals sign means equivalent. Equivalent is not the same ask ‘equals’.

## What does P mean in logic?

P :⇔ Q means P is defined to be logically equivalent to Q. A XOR B :⇔ (A ∨ B) ∧ ¬(A ∧ B)

## What is formal logic?

Formal logic, the abstract study of propositions, statements, or assertively used sentences and of deductive arguments. The discipline abstracts from the content of these elements the structures or logical forms that they embody.

## How do you repair an argument?

In such cases, it is necessary to reveal the unstated premise to evaluate the argument. We can say, then, that to repair an argument is to improve it by adding a premise or conclusion that is unstated in the original argument. We will discuss further examples of repairing arguments later in this lesson.

## What do 3 lines mean?

The triple bar, ≡, is a symbol with multiple, context-dependent meanings. It has the appearance of a “=” sign with a third line. In mathematics it sometimes used a symbol for congruence. Particularly, in number theory, it has the meaning of modular congruence: if N divides a − b.

## What is argument in symbolic logic?

In logic and philosophy, an argument is a series of statements (in a natural language), called the premises or premisses (both spellings are acceptable), intended to determine the degree of truth of another statement, the conclusion.

## Is there a symbol for and or?

There is no symbol for “and/or” likely because in technical or scientific realms “or” means “just A, just B, or both A and B.” Restated, “or” in technical realms is inclusive. “Exclusive or” or “xor” (pronounced eks-or) means only “just A or just B.”

## What is a chain argument?

Chain or Hypothetical Argument An argument composed entirely of conditional claims (premises and conclusion). When valid, the premises are arranged so that the consequent of one premise becomes the antecedent of the next. (This “linking” by repeating information is why it’s often called a chain argument.)

## What is an argument and a valid argument?

A deductive argument is said to be valid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. In effect, an argument is valid if the truth of the premises logically guarantees the truth of the conclusion.

## Is identically equal to?

(mathematics) “is identically equal to”. “is defined as” or “is set to”. The functions f and g satisfy f≡g if and only if their respective domain of definition coincide, and if f(x)=g(x) for all x in this domain. (number theory) “is congruent to”; used in calculations of modulo.