Demonstrative Reasoning and Deductive Evidence


Take even a simpler case, which seems more nearly resolvable into an expression of identity: 4=2+2. Even here, the meaning is not that the two members of the equation are identical, but only that the Concept or group four is equivalent in one respect – viz. the possession of an equal number of units – to the two groups two and two. It is plain that one group cannot be identical with two groups, or that two distinct acts of the mind, each conceiving or grasping together two units, cannot be literally the same thing as one mental act conceiving four.

– Bowen, F. 1864. A Treatise on Logic, The Laws of Pure Thought Cambridge, England: Cambridge University Press (1864) p. 360-1
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 )

Google photo

You are commenting using your Google 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 )

Connecting to %s