PHIL 2003 Lecture Notes - Lecture 3: Unified Modeling Language, Immanuel Kant, Ontario Health Insurance Plan
10 Feb 2016
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All arguments have a logical structure; that is, there will be a particular way in which the premises of the argument combine with one another to support the conclusion. We can represent this logical structure in a diagram. These diagrams are referred to as structure diagrams, or argument trees. Steps in constructing structure diagrams: number all the statements or claims made in the passage. Identify and cross out any parts of the passage that are not part of the argument: draw the structure diagram. Premises are always put above and conclusions below. 2 means that claim 2 is being derived from, inferred from, claim 1. (the arrow may therefore be omitted. ) When lines descending from premises join up before reaching the claim below, this means the premises must be taken together to have good reason to accept the conclusion. When the lines lead separately to the conclusion, this means each premise by itself provides good reason to accept the conclusion.
