Arguments Against God (Go Down For With God)

Each of the following arguments aims at showing that some particular conception of a god either is inherently meaningless, contradictory, or contradicts known scientific and/or historical facts, and that therefore a god thus described does not exist.

Empirical arguments (against)
Empirical arguments depend on empirical data in order to prove their conclusions.
"Within the framework of scientific rationalism one arrives at the belief in the nonexistence of God, not because of certain knowledge, but because of a sliding scale of methods. At one extreme, we can confidently rebut the personal Gods of creationists on firm empirical grounds: science is sufficient to conclude beyond reasonable doubt that there never was a worldwide flood and that the evolutionary sequence of the Cosmos does not follow either of the two versions of Genesis. The more we move toward a deistic and fuzzily defined God, however, the more scientific rationalism reaches into its toolbox and shifts from empirical science to logical philosophy informed by science. Ultimately, the most convincing arguments against a deistic God are Hume's dictum and Occam's razor. These are philosophical arguments, but they also constitute the bedrock of all of science, and cannot therefore be dismissed as non-scientific. The reason we put our trust in these two principles is because their application in the empirical sciences has led to such spectacular successes throughout the last three centuries."
The argument from inconsistent revelations contests the existence of the Middle Eastern, Biblical deity called God as described in holy scriptures, such as the Jewish Tanakh, the Christian Bible, or the Muslim Qur'an, by identifying contradictions between different scriptures, contradictions within a single scripture, or contradictions between scripture and known facts.
The problem of evil in general, and the logical and evidential arguments from evil in particular contest the existence of a god who is both omnipotent and omnibenevolent by arguing that such a god would not permit the existence of perceivable evil or suffering, which can easily be shown to exist. Already Epicure pointed out the contradiction, stating that if an omnipotent God existed, the evil in the world should be impossible. As there is evil in the world, the god must either not be omnipotent or he must not be omnibenevolent. If he is not omnipotent, he is not God; if he is not omnibenevolent, he is not God the Allmercyful, but an evil creature. Similar arguments have been performed by Schopenhauer.
The argument from poor design contests the idea that a god created life, on the basis that lifeforms exhibit poor or malevolent design, which can be easily explained using evolution and naturalism.
The argument from nonbelief contests the existence of an omnipotent god who wants humans to believe in him by arguing that such a god would do a better job of gathering believers. This argument is contested by the claim that God wants to test humans to see who has the most faith. However, this assertion is dismissed by the argument surrounding the problem of evil.

Deductive arguments (against)
Deductive arguments attempt to prove their conclusions by deductive reasoning from true premises.
The omnipotence paradox is one of many arguments which argue that the definitions or descriptions of a god are logically contradictory, demonstrating his non-existence. This paradox can be shown through questions such as: "Can God create a rock so big that He Himself could not lift it?" Some may argue that this paradox is resolved by the argument that such a rock is an impossibility of our reality rather than the result of an imperfect God.
One simple argument that the existence of a god is self-contradictory goes as follows: If God is defined as omniscient and omnipotent, then God has absolute knowledge of all events that will occur in the future, including all of his future actions, due to his omniscience. However, his omnipotence implies he has the power to act in a different manner than he predicted, thus implying that God's predictions about the future are fallible. This implies that God is not really omniscient, at least when it comes to knowledge about future events. So a God defined as omniscient and omnipotent cannot exist. Theists may counter that God exists out of time and the premises for this argument are wrong.
The argument from free will contests the existence of an omniscient god who has free will by arguing that the two properties are contradictory. If god has already planned the future, then humanity is destined to follow that plan and we do not have true free will to deviate from it. Therefore our freewill contradicts an omniscient god.
The Transcendental Argument for the Non-existence of God contests the existence of an intelligent creator by demonstrating that such a being would make logic and morality contingent, which is incompatible with the presuppositionalist assertion that they are necessary, and contradicts the efficacy of science. A more general line of argument based on TANG, seeks to generalize this argument to all necessary features of the universe and all god-concepts.
The counter-argument against the Cosmological argument ("chicken or the egg") states that if the Universe had to be created by God because it must have a creator, then God, in turn would have had to be created by some other God, and so on. This attacks the premise that the Universe is the second cause, (after God, who is claimed to be the first cause). A common response to this is that God exists outside of time and hence needs no cause. However, such arguments can also be applied to the universe itself - that since time began when the universe did, it is non-sensical to talk about a state "before" the universe which could have caused it, since cause requires time.
Theological noncognitivism, as used in literature, usually seeks to disprove the god-concept by showing that it is unverifiable and meaningless.
It is alleged that there is a logical impossibility in theism: God is defined as an extra-temporal being, but also as an active creator. The argument suggests that the very act of creation is inconceivable and absurd beyond the restraints of time.

Inductive arguments (against)
Inductive arguments argue their conclusions through inductive reasoning.
The atheist-existentialist argument for the non-existence of a perfect sentient being states that since existence precedes essence, it follows from the meaning of the term sentient that a sentient being cannot be complete or perfect. It is touched upon by Jean-Paul Sartre in Being and Nothingness. Sartre's phrasing is that God would be a pour-soi [a being-for-itself; a consciousness] who is also an en-soi [a being-in-itself; a thing]: which is a contradiction in terms. The argument is echoed thus in Salman Rushdie's novel Grimus: "That which is complete is also dead."
The "no reason" argument tries to show that an omnipotent or perfect being would not have any reason to act in any way, specifically creating the universe, because it would have no desires since the very concept of desire is subjectively human. As the universe exists, there is a contradiction, and therefore, an omnipotent god cannot exist. This argument is espoused by Scott Adams in the book God's Debris.
God is perfect. God also created man in his image. Man is imperfect, however. Therefore, God is imperfect and thus disproves himself.

Subjective arguments (against)
Similar to the subjective arguments for the existence of God, subjective arguments against the supernatural mainly rely on the testimony or experience of witnesses, or the propositions of a revealed religion in general.
The witness argument gives credibility to personal witnesses, contemporary and throughout the ages. Many people make claims that they have never seen God nor any evidence that God might exist.
The conflicted religions argument where specific to religions give widely differing accounts as to what God is and what God wants. All the contridictory accounts cannot be correct, so many if not all religions must be incorrect.
The Majority argument argues that despite the fact that people in all times and in different places have a similar belief, it is does not make it true (i.e Flat Earth).