Logic (Earth)

[Aqualung]

Originally Posted by yossarian22

but p1 makes a logically unsound assumption.

1.This looks like a caramel candy.
2. we can assume that this is a caramel candy because it looks like one.
This candy is actually a butterscotch candy.

Your argument is logically unsound, even if it's true. Premises don't have to be proven or even accepted outside the realm of the logical argument. If they did, nothing would ever get accomplished using logic, ever.

[Willamena]

Originally Posted by Comprehend

right. In that case your argument would look something like this:

p1. things are as they appear.
p2. the earth appears flat.
C. the earth is flat.

That would be sound logic but also untrue.

I would say, rather, that it is sound logic, and hence true in context.

[kadzbiz]

This is what I'm talking about difference perceptions. You can't argue with someone's else's hard unwavering belief.

Originally Posted by yossarian22

Meaning its curved.

No, it doesn't, necessarily. It could mean that the ship is floating in space and just coming up over the horizon. Nonsensical? Maybe, but logical to some.

Originally Posted by yossarian22

But the entire earth is not visible from space. Do the sections you are unable to see suddenly disappear? Besides, there are videos of the earth spinning on its axis.

Well, I say to you that the whole Earth IS visible from space. What sections that I am unable to see? Oh, you mean the other side of the flat Earth? Videos of the Earth spinning? OMG. Haven't you seen the effects they can do in movies? You're so easily duped!

I'm trying to make a point. Logic is what is in your own head. Your perception. When someone says, "Oh that makes sense." or "That's logical." it's because they can see it from your point of view, your perception, but if they can't and see it only from their own point, their own perception, then you will never convince them otherwise.

[Aqualung]

Originally Posted by kadzbiz

No, it doesn't, necessarily. It could mean that the ship is floating in space and just coming up over the horizon. Nonsensical? Maybe, but logical to some.

"Logical to some" is nonsensical. "Logical" only follows if it has met a well-defined, unchanging list of criteria (for example, does the conclusion follow from the premises). Logical and sensical or meaningful or believable or are not synonyms.

[rojse]

Originally Posted by Comprehend

right. In that case your argument would look something like this:

p1. things are as they appear.
p2. the earth appears flat.
C. the earth is flat.

That would be sound logic but also untrue.

It is fallacious logic - one of the in-built premises behind the conclusion is incorrect.

[yossarian22]

Originally Posted by Aqualung

Your argument is logically unsound, even if it's true. Premises don't have to be proven

An assumption used as a basis for an argument must be true at all times, or the assumption must address points where it does not apply.

[yossarian22]

Originally Posted by kadzbiz

This is what I'm talking about difference perceptions. You can't argue with someone's else's hard unwavering belief.

true

No, it doesn't, necessarily. It could mean that the ship is floating in space and just coming up over the horizon. Nonsensical? Maybe, but logical to some.

Contradicting the testimony of the sailors.

Well, I say to you that the whole Earth IS visible from space. What sections that I am unable to see? Oh, you mean the other side of the flat Earth?

even then, the entire earth would not fit, and portions would be missing.

I'm trying to make a point. Logic is what is in your own head. Your perception. When someone says, "Oh that makes sense." or "That's logical." it's because they can see it from your point of view, your perception, but if they can't and see it only from their own point, their own perception, then you will never convince them otherwise.

There is such thing as universal logic. People just ignore it in favor of their beliefs

[SoyLeche]

Originally Posted by rojse

It is fallacious logic - one of the in-built premises behind the conclusion is incorrect.

No, the logic is fine, that's the point. Any logical argument is only as good as it's premises. That's where the argument always should lie.

If we could all get a good basic understanding of logic we could get to the real discussions - which premises we should start with.