I have no reason to worry about evolution but look at my reply to Orbitaldawn, a lot of atheists are obsessed with it and any legitimate challenge to it because of a threat to their belief. Common descent is something for which there is no evidence. The comment was referring to the notion that something being different from its parents is proof of evolution. This is a common misconception about genetics. The fact of the matter is that rather than a difference or what people are actually meaning a change in genetic material it is a mix of existing genetic material.Biological evolution is fitness differences over time. You evolved from your parents. Your evolutionary fitness is different from them both due to the nature of inheritence and other indeterminate factors. It is an instance of evolution. Does this mean you were not created in the image of God? No, of course not. Evolution happens, get used to it. You just appear to have an issue with species level evolution (or macro evolution) for some reason. Hopefully, if you understand that common descent is no problem creation, purpose, original sin etc., you will start to worry about more important things.
This was actually a retort to the notion that evolution must be true because it has not been disproven. The common argument from ignorance. Helps to read the whole conversation sometimes.The most fun way to reply to a person that claims "there is no evidence for the existence of God" is by simply, and calmly saying:
"That is interesting, could you please provide a definition of God ? Thanks" and enjoy...
This is a semantics confusion. When people talk about proof they are not talking about absolute proof of a statement's truth. In reality there really is no absolute truth. We'll leave that out but it does illustrate that when people are talking of proof they cannot be referring to certainty that a claim is correct. There is no consensus whether proof should be used in science. Some scientists do use it and others try to avoid it. That does not mean they are abusing language, only that there's a difference of opinion over semantics.This is incorrect. No medicine gets "proven" to be efficient. Empirical science just cannot prove anything (read up on the problem of induction). What empirical science shows is that observations are largely in line with a particular theory (e.g. compound X is good for alleviating headaches by binding to receptor Y) and that the theory is not rejected.
As an example. In the case of Champix (listened to some interesting discussions about it this week on 702), the theory is that it helps stop smoking. Empirical observations suggest that this is likely true with a P-value of less than 0.05 with not a lot of side-effects (e.g. often associated with vivid dreaming). There is no proof, just that empirical observations suggest it works.
Language matters. Scientists often abuse language. The case of misusing the concept of "proof" is one such example.
The "no proof" concept in science is an ideal which itself does not fit in science as an investigation for truth. If we assume it to be true then science is itself an isolated field with no worth. But it can't be true because science is not isolated. Science interacts across a wide range of fields in society and as such has to conform to certain norms and standards not necessarily set by scientists or people acting primarily as scientists. It reminds of the imaginary philosophical void that some try to cling to.