It depends how you interpret those limits of your knowledge. If you want to discuss scientific principles, that is one thing. If you think you need to carry that into some obsessive compulsive belief system where you allow every idiotic possibility from 'homeopathy may not really have been disproved' to 'Pokemon and Superman could be real beings', I see no reason science and critical thinking requires such nonsense.
I have no reason to consider we are all in the Matrix. I have no problem stating unequivocally comic book characters are not real. Taking a scientific principle to such a level reflects just as irrational thinking as does not basing beliefs on evidence.
It doesn't seem he disagrees, if I'm reading him right.
The Matrix is a work of fiction and it's "ridiculous" to consider we're in the Matrix as the film lays out. The Bible is a work of fiction and it's "ridiculous" to consider we're in the world it lays out. But there are 3,000,000,000 more people who are telling us that the Bible is real than there are Matrix believers. We aren't treating theists differently than Matrixists argumentively; we'd evaluate new evidence as it comes in, and so far disagree that any is valid. We and you only treat them differently because they have massive adherents and we respond to whichever are claiming nonsense, both as a whole and piece-by-piece. If there were only a dozen theists on Earth I'd hardly ever even think about the issue.
I can distinguish between a holding a scientific principle and applying it irrationally.
It's not irrational to admit a slim possibility. If you've ever argued against a particular piece of "evidence" that a theist presents, you have indeed "entertained" theism, and quite properly so that you can refute it as it comes. You're either behaving as an agnostic, or are a hypocritical atheist (at least the kind of atheist you seem to believe yourself to be here).
The Earth is a sphere. How do you know? Have you personally been in orbit where you could look at the planet and actually see?
What is the point of remaining uncertain about the reality around you?
Many reasons. For one, because it allows you to admit that you're wrong. In your example, it would be admitting that the Earth isn't a sphere, it's an ellipsoid. And my admitting that I'm intentionally choosing a scientific definition of the Earth's shape and not a layman's in order to play "gotcha".
That's the point of being a skeptic, no matter if it's a skeptic of the obviously ridiculous, or one's own beliefs/claims.
fls said:
I think the accusation of "fluffy" is because you are making a distinction that doesn't seem to exist. If both atheists and agnostics are making the same statement about the limits of their knowledge, your choice to apply the label agnostic, on the basis of that statement, has nothing to do with a category difference and seems arbitrary.
They don't seem to be. Someone who claims "
I am certain that god(s) don't exist" is some type of an atheist. And an agnostic (or other type of atheist) wouldn't make that knowledge claim. So, there is a real difference.
"I'm certain that god exists"
"I'm certain that god doesn't exist"
Two extreme claims, neither backed by evidence. One is a type of theism, the other a type of atheism. So clearly there's room inbetween for less extreme positions. Would you call any position other than the two above "fluffy" fence-sitting?