Final answer:
Thomas Aquinas presented arguments based on natural implantation of knowledge, teleological design in reality, and the self-existence of God to justify that God's existence is self-evident.
Explanation:
Thomas Aquinas argued that the existence of God is self-evident using several key points. First, he highlighted that the knowledge of God is naturally implanted in all individuals, making God's existence self-evident. Additionally, Aquinas proposed a teleological argument, emphasizing the inherent design within reality as evidence of God's existence. Lastly, he explained that the proposition 'God exists' is self-evident because God is His own existence.
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