The book defines a few terms and logical symbols used thereafter and their applied empirical interpretation (pp.

In the illustration and table the following logical symbols are used:

In logic formulae, logical symbols are used instead of these phrases; see the discussion of notation.

You don't have to feel it, see it, understand it; you just have to work logical symbols about it.

The uraeus is a logical symbol for this dangerous power.

Others change the expressive power more significantly, by extending the semantics through additional quantifiers or other new logical symbols.

First-order logic can be studied in languages with fewer logical symbols than were described above.

Conventional computers perform operations on logical symbols, which are represented inside the machine by the flow of electrons.

The seventh bucket contains 54 commonly used mathematical and logical symbols.

Other logical symbols definable in terms of these can be used freely as notational shorthands.