Agnosticism is epistemologically self-contradictory on its own assumptions because its claim to make no assertion about ultimate reality rests upon a most comprehensive assertion about ultimate reality.
Cornelius Van TilRead
To admit one's own presuppositions and to point out the presuppositions of others is therefore to maintain that all reasoning is, in the nature of the case, circular reasoning. The starting-point, the method, and the conclusion are always involved in one another.
Interpretation
The quote suggests that understanding one's own beliefs and those of others reveals the interconnectedness of reasoning.
Cornelius Van Til's statement emphasizes the idea that all reasoning is circular, meaning that our starting beliefs, methods of thinking, and conclusions are intimately connected. By acknowledging our own presuppositions and recognizing those of others, we can become more aware of the foundational beliefs that shape our reasoning processes, suggesting that true objectivity is difficult to achieve.
In practice
In a debate about ethics, one might use this quote to highlight the biases in moral reasoning.
Agnosticism is epistemologically self-contradictory on its own assumptions because its claim to make no assertion about ultimate reality rests upon a most comprehensive assertion about ultimate reality.
The only proof for the existence of God is that without God you couldn't prove anything.
We are all as much extraordinary phenomena of nature as trees, clouds, the patterns in running water, the flickering of fire, the arrangement of the stars and the form of a galaxy.
There are no more thorough prudes than those who have some little secret to hide.
Best of an island is once you get there - you can't go any farther...you've come to the end of things.
Life on board a pleasure steamer violates every moral and physical condition of healthy life except fresh air. . . . It is a guzzling, lounging, gambling, dog's life. The only alternative to excitement is irritability.
...nothing on earth can stop man from feeling himself born for liberty. Never, whatever may happen, can he accept servitude; for he is a thinking creature.
And the men who loan money to governments, so called, for the purpose of enabling the latter to rob, enslave, and murder their people, are among the greatest villains that the world has ever seen. And they as much deserve to be hunted and killed (if they cannot otherwise be got rid of) as any slave traders, robbers, or pirates that ever lived.
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