For instance, the existence of computers is a result of the work of various people from different materials and expertise. In terms of necessity, computers are now needed because their creators imposed the need for them. In short, there is an originator to its necessity and existence. In relation to this, it can be proven that God exists because of the concept that nothing can exist without someone causing the necessity and creation of things that now exist. However, like St. Anselm’s proposition, this could face the problem of the requirement of scientific studies which demand tangible explanations.
3. The existence of evil is necessary as a tool to test one’s volition and faith in God. Although it does not necessarily mean that evil comes upon those who do evil, it is an important tool for God to measure the goodness of man. As J. L. Mackie explains, the biblical character Job was a righteous man but he experienced loses in terms of family, wealth and heath but it was necessary to determine if Job deserved to go to heaven or hell. Nevertheless, this argument can be faced with the problem of accusing God as unjust because that is what a man is called when he does evil to someone who has not done him any wrong.
4. Thomas Nagel believes that none of us can ever know what it is like to be a bat because we have different experiences from that of a bat. Even for instance, one metamorphoses to a bat, he could never tell how it is because he lacks the experience of being a bat from birth. The lack in experience makes the metamorphosed bat unable to fully understand how it is to be a bat. If Nagel is right, this would strengthen the philosophical idea that everything is physical. One may conceptualize a bat’s life but can never know how it is because of the lack of experience.
5. Monads, according to Leibniz, are simple substances which can make