Induction and Deduction
The process of forming and applying concepts contains the essential pattern of
two fundamental methods of cognition:
induction and deduction.
The process of observing the facts of reality and of integrating them into
concepts is, in essence, a process of induction. The process of subsuming new
instances under a known concept is, in essence, a process of deduction.
Copyright © 1986 by Harry Binswanger.
Introduction copyright © 1986 by Leonard Peikoff.
All rights reserved. For information address New American Library.
The Ominous Parallels, by Leonard Peikoff.
Copyright © 1982 by Leonard Peikoff. Reprinted with permission of
Stein and Day Publishers. Excerpts from The Romantic Manifesto,
by Ayn Rand. Copyright © 1971, by The Objectivist.
Reprinted with permission of Harper & Row, Publishers, Inc. Excerpts from
Atlas Shrugged, copyright © 1957 by Ayn Rand, The
Fountainhead, copyright © 1943 by Ayn Rand, and For the
New Intellectual, copyright © 1961 by Ayn Rand. Reprinted by
permission of the Estate of Ayn Rand. Excerpts from Philosophy: Who
Needs It, by Ayn Rand. Copyright © 1982 by
Leonard Peikoff, Executor, Estate of Ayn Rand. Reprinted by
permission of the Estate of Ayn Rand. Excerpts from “The Philosophy
of Objectivism” lecture series. Copyright © 1976 by
Leonard Peikoff. Reprinted by permission. Excerpts from Alvin
Toffler’s interview with Ayn Rand, which first appeared in
Playboy magazine. Copyright © 1964. Reprinted by permission
of Alvin Toffler. All rights reserved including the right of reproduction
in whole or in part in any form. Used by arrangement with Plume, a member of
Penguin Group (USA), Inc.