# A report onProposition

Meaning of a declarative sentence.

- Proposition

## Gottlob Frege

German philosopher, logician, and mathematician.

German philosopher, logician, and mathematician.

In Foundations and "The Thought", Frege argues for Platonism against psychologism or formalism, concerning numbers and propositions respectively.

## Logic

Study of correct reasoning or good arguments.

Study of correct reasoning or good arguments.

In this sense, it is equivalent to formal logic and constitutes a formal science investigating how conclusions follow from premises in a topic-neutral way or which propositions are true only in virtue of the logical vocabulary they contain.

## Truth value

In logic and mathematics, a truth value, sometimes called a logical value, is a value indicating the relation of a proposition to truth.

## Truth

Property of being in accord with fact or reality.

Property of being in accord with fact or reality.

In everyday language, truth is typically ascribed to things that aim to represent reality or otherwise correspond to it, such as beliefs, propositions, and declarative sentences.

## Truth-bearer

Entity that is said to be either true or false and nothing else.

Entity that is said to be either true or false and nothing else.

Truth-bearer candidates include propositions, sentences, sentence-tokens, statements, beliefs, thoughts, intuitions, utterances, and judgements but different authors exclude one or more of these, deny their existence, argue that they are true only in a derivative sense, assert or assume that the terms are synonymous,

## Ludwig Wittgenstein

Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.

Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.

The "early Wittgenstein" was concerned with the logical relationship between propositions and the world, and he believed that by providing an account of the logic underlying this relationship, he had solved all philosophical problems.

## Propositional calculus

Branch of logic.

Branch of logic.

It deals with propositions (which can be true or false) and relations between propositions, including the construction of arguments based on them.

## Belief

A belief is an attitude that something is the case, or that some proposition about the universe is true.

## False (logic)

State of possessing negative truth value or a nullary logical connective.

State of possessing negative truth value or a nullary logical connective.

. A statement that entails false itself is sometimes called a contradiction, and contradictions and false are sometimes not distinguished, especially due to the Latin term falsum being used in English to denote either, but false is one specific proposition.