... must be a point at which this continuum ends or else none of the grounds would be compelling. As C.I.Lewis commented in the Introduction to Contemporary Epistemology, "Unless something is certain, nothing else is even probable." This principal motive is known as the epistemological motive, behind foundationalism, the pursuit for certain, unshakeable knowledge. The second is the logical motive. It is hard to intelligibly conceive an infinite chain of justification regressing into space. If this were the case then as finite, mortal beings, we would not be able to fulfil the sequence of reasoning. Therefore removing the possibility of justifiably explaining what it is to "know." It seems more coherent to perceive a starting point from which we then develop all other knowledge, in the same way that we innately have the principles of language and then develop our vocabulary and grammar. Finally foundationalists have a psychological motive. They ...

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