ber38413_fm_i-x.indd Page ix 12/12/12 8:51 AM user-F/W/149
Our overall goal in the sixth edition of The Logic Book remains the same as in
earlier versions: presenting deductive symbolic logic in an accessible yet formally rigorous way
The Tell-Tale Heart by Edgar Allan Poe
Which of the narrators senses does he say is most acute?
Why does the narrator want to kill the old man?
a. the old man had hurt
Once you have an argument
summarized/standardized, you need to evaluate it
to see if you are forced to accept the conclusion.
There are two main questions to ask when doing
Logical Fallacies I
Fallacies of Relevance
Logical Fallacy (or fallacy): an argument that
contains a mistake in reasoning.
Fallacy of Relevance: because the premise are
logically irrelevant to the conclusion.
Relevance has nothing
Analyzing Shorter Arguments
You can analyze shorter arguments by
numbering the premises and conclusion, and
representing their relationships with arrows.
Example: (1) The death penalty should be