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A Must Have Book For Every Philosophy Student
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Philosophy Student

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Negation introduction

In symbolic logic, a valid inference in a system of truth-functional rules. This rule relies on the concept of noncontradiction: A valid argument’s conclusion cannot be false if the premise(s)…
Philosophy Student
December 9, 2023
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Negation elimination

In symbolic logic, a valid inference in a system of truth-functional rules. This rule relies on the truth definition of the negation, where a doubly negated statement (¬¬P) is truth…
Philosophy Student
December 9, 2023
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Negation

In symbolic logic, the operator that denies a claim. When a statement is negated, its truth value is the opposite of the original: When P is true, ¬ P is…
Philosophy Student
December 9, 2023
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Necessity

That without which cannot be otherwise. Also: A statement that must be true. A statement is necessarily true (or false) if it could not have been otherwise; it has the…
Philosophy Student
December 9, 2023
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Naturalistic fallacy

Argument advanced by G. E. Moore (1873-1958) that any attempt to define “good” in terms of some other property (such as pleasure) will either conflate ethical propositions with psychological propositions…
Philosophy Student
December 9, 2023
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Naturalism

The theory that everything can be explained in terms of causal claims and facts. https://youtube.com/shorts/UXAxnff4wUw?feature=share
Philosophy Student
December 9, 2023
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Natural law theory

The ethical theory that there are natural laws and a natural order that ought not to be violated. https://youtube.com/shorts/y68AL97E8XE?feature=share
Philosophy Student
December 9, 2023