Since we think we understand when we know the explanation, and there are four types of explanation (one, what it is to be a thing; one, that if certain things hold it is necessary that this does; another, what initiated… — Aristotle Copy Share Image
The explanation of types of structure in classes - as resulting from the will of the Deity, to create animals on certain plans - is no explanation. It has not the character of a physical law and is therefore utterly… — Charles Darwin Copy Share Image
