The Laws of Logical Thought

Posted: October 30, 2013 in Uncategorized

The 3 Laws of Logical thought are as follows

1) Law of identity:  A is A

A is A which means Everything is the same as itself; or a statement cannot not remain the same and change its truth value.

As per Aristotle is “that every thing is the same with itself and different from another”: A is A and not ~A.

2) Law of of non-contradiction:  NOT (A and not A)

Nothing can both exist and not exist at the same time and
in the same respect; or no statement is both true and false.

As per Aristotle “one cannot say of something that it is and that it is not in the same respect and at the same time”.

3. The law of non excluded middle Either (A or not A)

Something either exists or does not exist; or every statement
is either true or false.

As per Aristole “But on the other hand there cannot be an intermediate between contradictories, but of one subject we must either affirm or deny any one predicate. This is clear, in the first place, if we define what the true and the false are. To say of what is that it is not, or of what is not that it is, is false, while to say of what is that it is, and of what is not that it is not, is true; so that he who says of anything that it is, or that it is not, will say either what is true or what is false; …”

 

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s