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Definition:
A disjunction is a proposition which is always true so long as one or the other term
is true. The technical form is:
Either P or Q.
For example:
Either I have 3 books, or I have 4 books.
The entire statement is true so long as one of the two terms ("I have 3 books" and "I have 4 books") is true. If both are false, then the entire statement is false.
A disjunctive syllogism is a syllogism which draws its inference from a disjunction. The technical form is:
Either P or Q.
not P.
Therefore, Q.
For example:
Either I drove to work today, or I walked to work.
I did not drive to work today.
Therefore, I walked to work today.
Also Known As: none
Alternate Spellings: none
Common Misspellings: none
Related Resources:
What is the Logic and the Philosophy of Language?
The two fields Logic and the Philosophy of Language are often treated separately, but they are nevertheless close enough that they are presented together here. Logic is the study of methods of reasoning and argumentation, both proper and improper. The Philosophy of Language, on the other hand, involves the study of how our language interacts with our thinking.What is Philosophy?
What is philosophy? Is there any point in studying philosophy, or is it a useless subject? What are the different branches of philosophy - what's the difference between aestheitcs and ethics? What's the difference between metaphysics and epistemology?
