PHIL 210 Chapter Notes - Chapter 2: Inductive Reasoning, Deductive Reasoning, Logical Reasoning
19 Oct 2018
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Clear thinking in a blurry word by tim kenyon. Cogency is a broader notion of support in situations where our reasoning aims to express how our imperfect knowledge supports some conclusion only to a degree (validity does not strictly come in degrees). An argument is cogent when it makes its conclusion rationally credible; a strongly cogent argument provides high degree of justification for its conclusion. Cogency is a property that both deductive and inductive arguments can share. Ampliative arguments are those in which the conclusion amplifies on the premises, expressing info that cannot be validly inferred from them. While strictly unsound, ampliative arguments can be cogent to varying degrees. (ex. Statements and arguments called empirical are virtually all justified in ampliative terms. Inductive argument is the most widespread and important form of ampliative reasoning; they are not intended to deductively valid; they can be cogent.
