April 6th, 2013
The fine-tuning argument argues that when physics and the laws of nature are expressed mathematically their values are ever so balanced in a way that permits the existence of life. I’m merely arguing that the universe is finely tuned for the essential building blocks and environments that life requires.
- Given the fine-tuning evidence, a life permitting universe (LPU) is very, very unlikely under the non-existence of a fine-tuner (~FT): that is, P(LPU|~FT & k) ≪ 1.
- Given the fine-tuning evidence, LPU is not unlikely under FT (Fine-Tuner): that is, ~P(LPU|FT & k) ≪ 1.
- Therefore, LPU strongly supports FT over ~FT.
Defense of 1: Given the fine-tuning evidence, a life-permitting universe is very, very unlikely under the non-existence of a fine-tuner.
So what are some of the evidences for fine-tuning?
- Roger Penrose calculates that the odds of the special low entropy condition having come about by chance in the absence of any constraining principles is at least as small as about one in 1010^123.
- Strong Nuclear Force (Strong nuclear force coupling constant, gs = 15)
- +, No hydrogen, an essential element of life
- -, Only hydrogen
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April 5th, 2013
The following argument is an abductive Thomistic cosmological argument from contingency, which I presented at my recent Ratio Christi debate.
- There are contingent constituents to the universe.
- Given the contingent constituents of the universe, the existence of the universe (U) is very, very unlikely under the hypothesis that these constituents are themselves uncaused or self-caused (~Cu): that is, P(U|~Cu & k) ≪ 1.
- Given the contingent constituents of the universe, the existence of the universe is not unlikely under the hypothesis of a first uncaused cause (Cu): that is, ~P(U|Cu & k) ≪ 1.
- Therefore, U strongly supports Cu over ~Cu.
The constituents of the universe include galaxies, planets, stars, cars, humans, leptons, bosons, and other particles. For the constituents of the universe to be uncaused that would mean it is metaphysically necessary. For something to be metaphysically necessary that means that it could not have failed to exist—it exists in every possible world.
For something to be self-caused it must be simultaneously antecedent to itself to produce itself as its own effect. But this contradictory. This would be akin to the ultimate bootstrapping trick.
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January 21st, 2013
I am currently a college student with a strong interest in apologetics. I’ve seen that, by and large, the arguments that apologists use seem to have shown themselves logically sound and hard to disprove despite decades or centuries of them being around. So the theist’s arguments seem to have many strong points. What would be considered the “weak spots” of the apologetic arguments? What arguments might the skeptic use that have the most potential to show that theism is false and that God does not exist?
Thank you. (Shawn)
This is a very interesting question since it seems to me that I’d have to be showing those at the table what my hand is. There are few weak spots in apologetic arguments and I think the two I see most concerning are 1) poor methodology and 2) theoretical implications for parts of the arguments/defense.
Let’s first look at some poor methodology. Most arguments you’ll find in the deductive, inductive, or abductive form. I’m a staunch proponent of abductive arguments. Here’s an example of William Lane Craig’s fine-tuning argument.
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