As philosopher Edward Feser has pointed out, some atheists are simply not intellectually serious. They may be very ignorant or uneducated, directly dishonest, deeply confused, ill-informed, willfully obtuse, ideologically dogmatic, or just plain stupid; the end result is the same: it is not possible or fruitful to have a serious, rational discussion about God with such people. Here are some red flags which will alert you that you are dealing with an intellectually dishonest or defective atheist:
✅ 1. A persistent inability or refusal to distinguish God from a god or gods. This is a distinction 3 or 4-year-old children can easily grasp, so any atheist who claims not be be able to grasp it is either severely intellectually impaired or lying. In almost all cases, the atheist is simply attempting to conflate God with a god in order to set up a strawman and/or trying to annoy you by belittling God—while ignoring the basic conceptual distinction that all European languages mark by differentiating the word “God” from the word “god” by capitalization. As the Stanford Encyclopedia of Philosophy explains, in the entry written by atheist philosopher J. J. C. Smart:
‘Atheism’ means the negation of theism, the denial of the existence of God. I shall here assume that the God in question is that of a sophisticated monotheism. The tribal gods of the early inhabitants of Palestine are of little or no philosophical interest. They were essentially finite beings, and the god of one tribe or collection of tribes was regarded as good in that it enabled victory in war against tribes with less powerful gods. Similarly the Greek and Roman gods were more like mythical heroes and heroines than like the omnipotent, omniscient and good God postulated in mediaeval and modern philosophy.
Theists have little to no interest in discussing gods, at least not when God is the topic of discussion. If an atheist wants to discuss gods, he is free to do so, but he cannot pretend talk of gods has any bearing on or relevance to a discussion about God.
✅ 1.1 A persistent inability or refusal to distinguish God from such things as imaginary friends, faeries, wizards, spaghetti monsters, Santa Claus, or other fabulous, fictitious, or mythological entities.
✅ 1.2 A persistent habit of paraphrasing religious ideas in ways which are deliberately ludicrous, derisive, or tendentious, e.g. describing the resurrected Christ as “a zombie,” or God as a “sky daddy.”
✅ 1.3 Persistent use of the fallacious “I just believe in one god less than you” rhetorical trope.
✅ 1.4 Persistent use of tendentious and irrelevant rhetorical mischaracterizations of Christianity, e.g. as “Bronze Age mythology.” Christianity, of course, dates from long after the so-called “metallic” ages, in fact from the prime of the Roman Empire, on of humanity’s civilizational high points. And Judaism, its precursor religion, derives almost entirely from the Iron Age up through historical times—not that the age of a teaching has any bearing whatever on its truth-value.
✅ 1.5 Persistent dishonest characterization of God as some kind of “cosmic tyrant” or “cosmic oppressor” (interestingly enough. the position of Satan).
✅ 1.6 Persistent dishonest characterization of God, especially in the Old Testament, as a moral monster.
✅ 1.7 A persistent inability or refusal to distinguish miracles from magic, usually paired with a tendency to attribute magical powers to nature, e.g. in such claims as “the universe created itself out of nothing” or “properties such as consciousness just emerge out of unconscious matter, because they do.”
✅ 2.0 Belief in scientism, the logically incoherent claim that “only scientific knowledge is valid/real/genuine knowledge” or that “only science or the scientific method can establish the truth-value of propositions,” claims which are neither themselves scientific nor established by science, and hence, self-defeating, and which entail such absurdities as “no human being knew anything before Europeans in the 1600s.”
✅ 2.1 Persistent claims that science, which studies physical nature by means of empirical observation and quantitative measurement, has any bearing on the question of the existence of God, who is by definition, beyond nature, not empirical, and not measurable in terms of quantity. Persistent insistence that claims about God must be proven “scientifically” or that any evidence for God must be “scientific” fall into this category.
✅ 2.2 The claim that Galileo Galilei’s run-in with the Roman Catholic Church in 1633 proves (somehow) that there is some kind of natural antipathy between either (a) science and religion, or (b) science and Christianity, or (c) science and Catholicism. This indicates a complete ignorance of the history of the Galileo affair, and is merely a recycled weaponized meme of the early Enlightenment.
✅ 2.3 Use of the non sequitur that the multiplicity of religions proves that no religion is true, either wholly or in part. By this logic, of course, one may also “prove” that no scientific theory is or can be correct, wholly or in part, since there are always rival theories.
✅ 2.4 Claiming or assuming that the atheist, a finite being who is not all-knowing, is not all-powerful, is not all-wise, and is not all-good, nevertheless is in an epistemic position to know with certainty what an all-knowing, all-powerful, all-wise, all-good being would or would not do or have done.
✅ 2.5 The belief the atheist knows the true or real origin of religion in human pre-history, a matter which, since it occurs far in human pre-history, we have no certain knowledge of, but only conjecture.
✅ 2.6 The peculiar belief held by some atheists that their total ignorance with respect to God and divine matters is in fact an infallible indication of their intelligence or wisdom or knowledgeableness precisely about the things about which they know nothing.
✅ 2.7 Repeated assertion of the evidently false claim “there’s no evidence for God.”
✅ 3.0 Persistent use of the burden of proof fallacy, that is, the rhetorical trope which combines an argument from ignorance (“my position is the default position,” i.e. “my position is true until proven false, so I need not argue for it) with special pleading that the atheist be allowed to use arguments to ignorance in support of atheism (i.e. “atheism is true because I am totally ignorant about God or divine matters”).
✅ 3.1 Chronological bigotry, i.e. the absurd belief that human beings who lived prior to (say) Richard Dawkins were one and all somehow mentally inferior to anyone living today, up to and including the greatest minds of the past. This would also include the belief that all human beings in the past were incapable of skepticism or critical thinking, or were somehow exceptionally gullible or credulous in a way we, the Enlightened Moderns, are not.
✅ 3.2 “Arguments” that consist wholly of posting atheist memes, e.g. “Eric the God-Eating Penguin.”
✅ 3.3 “Arguments” that consist of no more than exercises in blasphemy or obscenity.