The degree to which a belief is justified

The degree to which a belief is true

The degree to which a belief is useful

The degree to which a belief is certain

The problem of explaining how the universe came into being

The problem of explaining how life arose from non-living matter

The problem of explaining why there is something rather than nothing

The problem of explaining why the universe is fine-tuned for life

The principle that the universe must be fine-tuned for life because otherwise we wouldn't be here to observe it

The principle that the universe is infinite and therefore there must be an infinite number of life-bearing planets

The principle that the universe is constantly expanding and therefore there must be new life-bearing planets forming all the time

The principle that the universe is governed by natural laws that make the development of life inevitable

The theory that there are an infinite number of universes, each with its own set of physical laws

The theory that there are an infinite number of universes, each with its own set of initial conditions

The theory that there are an infinite number of universes, each with its own set of physical laws and initial conditions

The theory that there are an infinite number of universes, each with its own set of physical laws, initial conditions, and history

The argument that the universe is fine-tuned for life because otherwise we wouldn't be here to observe it

The argument that the universe is fine-tuned for life because there is no other way for life to exist

The argument that the universe is fine-tuned for life because it is the only way for life to exist

The argument that the universe is fine-tuned for life because it is the best way for life to exist

The theory that life arose from non-living matter through a process of natural selection

The theory that life arose from non-living matter through a process of random chance

The theory that life arose from non-living matter through a process of intelligent design

The theory that life arose from non-living matter through a process of evolution

The theory that life arose from non-living matter through a process of intelligent design

The theory that life arose from non-living matter through a process of natural selection

The theory that life arose from non-living matter through a process of random chance

The theory that life arose from non-living matter through a process of evolution

The fallacy of deriving an ought from an is

The fallacy of deriving an is from an ought

The fallacy of deriving a moral conclusion from a non-moral premise

The fallacy of deriving a non-moral conclusion from a moral premise

The problem of justifying the belief that the future will be like the past

The problem of justifying the belief that the laws of nature are universal

The problem of justifying the belief that our senses are reliable

The problem of justifying the belief that our reason is reliable

The argument that we cannot know anything for certain

The argument that we can only know things that are self-evident

The argument that we can only know things that are supported by evidence

The argument that we can only know things that are supported by reason

The argument that I think, therefore I am

The argument that I am, therefore I think

The argument that I am, therefore I exist

The argument that I exist, therefore I am

The problem of how we can know that other minds exist

The problem of how we can know what other minds are like

The problem of how we can communicate with other minds

The problem of how we can control other minds

The argument that we might be brains in vats, being fed artificial experiences

The argument that we might be brains in vats, being fed real experiences

The argument that we might be brains in vats, being fed both artificial and real experiences

The argument that we might be brains in vats, being fed no experiences at all

The hypothesis that we might be living in a computer simulation

The hypothesis that we might be living in a real world

The hypothesis that we might be living in a both a computer simulation and a real world

The hypothesis that we might not be living in a computer simulation or a real world

There is no meaning to life

The meaning of life is to be happy

The meaning of life is to find your purpose

The meaning of life is to make a difference in the world