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Formal

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The term formal has a number of uses

In Logic , formal Logic Reason s about a Logical Argument based only on the form and not on the Meaning .

::The conclusion follows from Propositional Logic . The Soundness of this argument can be seen by substituting in symbols to make the form clear.
:If S is a P and all P are M, then S is M

Formal Verification works in a Formal Language to attempt to prove Formal Properties hold for a Formal Specification of a Formal System

Formal Power Series extend the notion of a Power Series by removing the requirement for Convergence . Thus they have the same form as a power series, but their more Abstract interpretation, not implying a meaningful sum of the series, can be applied more generally.

A Formal Calculation is one involving manipulation of symbols.

Formal Grammar – Formal System – Formal Set Theory

Formal Occasion s such as a Formal Dinner Party or High Tea might require one to wear Formal Attire such as an Evening Gown or Tuxedo . An example is Formal Hall .

In British & Australian English , the formal is the same as the event referred to by American English speakers as the Prom .

In American English, the formal most often refers to an event similar to the above, but organized by a college or university organization, typically but not always a Fraternity Or Sorority .

As an Adjective , formal means being in accord with established Forms or the Antonym of Informal (or Casual ).

In Histology , a short form for Formalin or Formaldehyde often used as a prefix in compound expressions.

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Informal – Casual – Intuitive