Atheism an “argument from ignorance”?

“I don’t know for sure that there isn’t a god, and I never said I did. I simply don’t believe that there is one…”

Question from Jay:
How is an atheist’s argument that there is no God any different from a Deist’s argument that there is a God? Both are unfalsifiable stances. How is an atheist’s view any better? You maintain your stance because it is the best answer you can come up with. You cannot rationally explain your stance any better than I can. How do you rationally know there isn’t a God? I know, you’ll say I don’t know 100 percent, well nobody does. But you asked this same question to a Deist, can you answer it?

I don’t know for sure that there isn’t a god, and I never said I did. I simply don’t believe that there is one, and I don’t think it’s likely either for reasons I’ll go into when answering your subsequent question.

Deists have an easier time defending their position than theists because they don’t have to establish any interference by a god since what they see as the act of Creation. Of course they do have to argue for Creation the same as theists, and there’s your overlap. I’ve laid out my basic position on the cosmological argument here in response to both theists and deists.


Eternal inflation? No. Eternal universe? Maybe, nevertheless. And what’s it to ya?

“These three scientists in particular, by virtue of their joint paper, are name-checked more often than any others by apologists not just arguing for an absolute beginning to the universe but claiming that this has been established beyond doubt.”

Scientists Arvin Borde, Alan Guth and Alexander Vilenkin, in their 2003 paper “Inflationary Spacetimes Are Incomplete in Past Directions”, ruled out past-eternal inflationary models of the universe. Does this prove that
1. the universe had an absolute beginning,
2. that it must have had a cause and
3. that the cause was God?

No, no and no.

These three scientists in particular, by virtue of their joint paper, are name-checked more often than any others by apologists not just arguing for an absolute beginning to the universe but claiming that this has been established beyond doubt. Apologists up to and including William Lane Craig do this to support the cosmological argument for God, which requires such a beginning to be indisputable.

So what does the paper actually say? Feel free to read it via the link above (it’s dense but short), but the thrust is in the title: spacetime can’t have been inflating infinitely into the past.

That seems obvious since you’d think you’d eventually reach a singularity if you worked backwards, but models have been proposed wherein the farther back you go the slower the expansion is. Some reasoned that perhaps the universe has spent eternity inflating extremely slowly from a size barely larger than a singularity, speeding up as it went along.

Borde, Guth and Vilenkin examined this idea and found, essentially, that it wouldn’t work in the real world. In doing so they pretty much dismissed every model of an expanding universe (or multiverse) that doesn’t involve a proper singularity and Big Bang. Therefore, according to apologists, the universe definitely had an absolute beginning, which must have had a cause, and that cause was God.

That’s going way too far because, for a start, the paper doesn’t take a position on whether the now-confirmed Big Bang was an absolute beginning. There are many more universe/multiverse models wherein the Big Bang was merely an event in an ongoing sequence – where the matter in the singularity came from somewhere, not nowhere. Borde et al only intended to rule out a family of models that clearly don’t work.

Get that? Borde, Guth and Vilenkin did NOT rule out an eternal universe, even if the result of their paper is correct. They merely ruled out one kind of eternal universe, the kind where the Big Bang never happened. The fact that there was a Big Bang does not mean there was nothing before the Big Bang.

The Big Bang as absolute zero, or an absolute beginning in general, is a poor platform for apologetics in any case. The idea that whatever begins to exist has a cause is not based on anything which physically began to exist in the same way the universe supposedly did, completely ex nihilo (literally “from nothing”). We’ve never seen anything like that happen, so:
1. it’s curious that so many people assume the universe came about in this way,
2. there’s no basis for assigning a cause if it did and
3. even if it had a cause, it’s a huge leap to declare it any kind of god, let alone someone’s specific personal deity.


The Great Big Arguments #3: Cosmological

“My aim is make this a reference for any subsequent “origin” questions.”

This is the Cosmological Argument for the existence of God, in the form of the popular Kalam Cosmological Argument:

1. Whatever begins to exist has a cause.
2. The universe began to exist.
3. Therefore, the universe had a cause.
Following on from that, the cause of the universe must have been eternal and therefore without cause. Besides being eternal, this Uncaused Cause must have been all-powerful and all-knowing, as it literally created everything else. It must be God.

My aim is make this a reference for any subsequent “origin” questions.

The Cosmological Argument or Argument from First Cause is the proper form of the common argument that the universe must have been deliberately created, and you can’t get “something from nothing”. It predates Christianity, as Plato and Aristotle had their own versions.

That’s the first issue with the argument: it only attempts to prove the existence of a Creator. It is therefore a deist argument, so when a theist uses it to prove a specific god with no further logic it’s a step too far. Keep an eye out for this.

The basic premise that everything finite requires a cause is the least controversial part, but even this isn’t rock solid. Possible exceptions are found in quantum mechanics, where particles move about in a probabilistic fashion. Until observed, a particle may be anywhere in a small area, and in a sense is everywhere in the area. When you observe it, it picks one spot and stays there. This is of course a gross oversimplification, but the point is that there’s no known force moving the particles around. There may actually be no cause as such, and the universe may be far more spontaneous than we think.

Even “something from nothing” is plausible according to a related theory that “nothing” is really a quantum foam from which matter may emerge. This is purely theoretical at the moment (it makes mathematical sense, but there’s not much physical evidence), but it’s worth remembering that science is actually considering ways like this in which matter could just pop out of “nothing”. It can’t be dismissed entirely.

Causality may also be irrelevant if time wasn’t linear at the beginning, if it had a beginning. An effect must follow its cause, but this is meaningless if chronological order hasn’t settled down yet.

The universe is widely regarded by lay people (who aren’t young-earth creationists) to have begun with the Big Bang. This may seem counterintuitive – how can something be created by an explosion instead of destroyed? – but it was no ordinary explosion. All the matter and energy in the universe was compressed into a singularity, a point so small it had no volume at all. (Absurd as this sounds, it happens today with large amounts of matter in the centres of black holes.) Then it expanded outwards, and it’s still expanding to this day. Once the matter was in that singularity, nothing was created or destroyed, only distrubuted.

How did the matter get in there? Was the Big Bang the true beginning, or a continuation of something else? We haven’t a clue. A god is one hypothesis. Other universes, with their own separate systems of time and space, are another. The quantum foam is an outside chance. Who knows what else we haven’t thought of.

I like the idea of a multiverse, an eternal group or series of universes setting each other off. It’s got one up on gods because it’s multiple instances of a known object. We know there’s at least one universe (this one), while we don’t have a single example of an established god. If you see a huge cabbage patch where the whole crop’s been eaten, and you find one fat little rabbit in the corner, do you assume that Bigfoot must have done most of the damage? No, you wonder where all the other rabbits are hiding.

The theory of expansion and contraction, of many Big Bangs and Big Crunches, has fallen apart recently with the discovery that the expansion of the universe is apparently accelerating. That means it will never return to the singularity, and it is not cyclical in the way we thought. That doesn’t stop it from being cyclical in other ways, for example stretching until it tears a hole and then draining out to somewhere else.

The point is that if you do accept that everything finite must have a cause, something must be eternal. Either it’s the universe/multiverse, or it’s a god. There are many theories, and potentially many more, which allow for an eternal universe which needs no cause. Therefore an eternal god is not the only option, and anything which says so is a poor attempted proof of its existence.


Note: The argument that a god created the universe based on the universe’s nature, order, awesomeness, etc. is not related to causality. It’s the Argument from Design, which is next on the GBA hitlist.