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Author Topic:   How do "novel" features evolve?
crashfrog
Member (Idle past 1494 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


(1)
Message 53 of 314 (659819)
04-18-2012 10:26 PM
Reply to: Message 52 by foreveryoung
04-18-2012 10:17 PM


Changes in the composition of traits in breeding populations cannot create new structures where none existed before.
Structures are traits.

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crashfrog
Member (Idle past 1494 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


(2)
Message 158 of 314 (660134)
04-21-2012 11:59 AM
Reply to: Message 156 by foreveryoung
04-21-2012 11:43 AM


Re: slightly off topic ... but we can redirect
Logic is either right or it is wrong. It is based upon premises.
Sorry, but this is a completely mistaken view of logic.
Logic is either valid or invalid. Logic is a set of "transformations" that input premises and output conclusions, with the proviso that each transformation is valid if it preserves the truth value of the input; that is, if you input true premises and use only valid transformations, then your conclusions will be similarly true.
Logic is based on premises, but the truth or falsity of those premises cannot be proven, they can only be assumed. Statements in logic are therefore all tautologies; only true because their premises are assumed.
It is for this reason that science is based on evidence, not logic. Propositions in science rest or fall on the basis of evidence. If you cannot marshal evidence in favor of your views, it's unreasonable to expect anyone to accept them. Many things we know to be false about the universe are completely logical; the "luminiferous ether" was assumed to exist based on the very simple logic that if light is a wave, it must be a wave of something. But the existence of the luminiferous ether was disproven by the Michaelson-Morley experiment in 1887.
Just please quite the tired old "evidence" malarkey.
Evidence is not "malarkey", it is the basis of all scientific reasoning.

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crashfrog
Member (Idle past 1494 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 160 of 314 (660136)
04-21-2012 12:06 PM
Reply to: Message 159 by foreveryoung
04-21-2012 12:02 PM


Re: slightly off topic ... but we can redirect
How do you determine what is evidence and what isn't evidence without logic?
Evidence is that which lends support to a hypothesis.
Is reality discovered strictly by science?
Reality can be discovered only by observation of it.

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crashfrog
Member (Idle past 1494 days)
Posts: 19762
From: Silver Spring, MD
Joined: 03-20-2003


Message 162 of 314 (660138)
04-21-2012 12:07 PM
Reply to: Message 161 by foreveryoung
04-21-2012 12:06 PM


Re: slightly off topic ... but we can redirect
Are you going to do that or are you going to ask me for evidence again?
I've not asked you for any evidence at all. But it's likely that you're going to continue to be asked for evidence until you provide some. Is there some reason you can't?

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