The first and most important step is the one that creationists seem to be incapable of. One needs a testable hypothesis. It is a must if one wants to claim to have evidence. Do you think that you can come up with a model that can be tested on its own merits? In other words what reasonable test (and please do not refer to evolution here) that could possibly refute creationism would you make?
I am not the OP, but have at it. It would be nice if you could find alternatives that have evidence that support them (that means they should be falsifiable).
If I proposed anything, it wouldn't be to suggest testing God or any claims of what God has done. That is why I've been asking: what do you really want?
The conditions of the request entail 2 things: 1) That the hypothesis be mechanistic in nature, 2) that the phenomena studied be understandable. Those two things, by their very nature, strip the primary motivation Christians have for discussing this topic in a creationist context. The only motivation that is left if those conditions are accepted are things like stroking my ego that I'm right, the satisfaction of proving you wrong, etc. That such is the case should be obvious from the way thousands and thousands of these conversations have proceeded in the past.
That's not an encouraging premise for a sincere conversation. But I will add one more wrinkle.
I am, for the most part, an instrumentalist. Therefore, my approach to science is: If the model is effective, that's fine - use it. I could give you a long list of engineering models that are effective, but which are physically wrong. Therefore, if evolution is effective in producing a new medical cure, etc. - that's fine, use it. That will never address the philosophical or theological issues, however, which require a different intellectual framework. If that's not the point you aim to discuss, then I guess it doesn't matter.
And, for my part, I'm more interested in combating the rampant realism and Platonism in science than I am evolution in and of itself.
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So here we are. In short, I would be interested in investigating the possibility of the rapid emergence of organisms from DNA pools rather than by mutation and inheritance.
But let's also face up to another issue. Evolution is a change in the allele frequency of a population, yes? That's the technical side of it. But on another side, the word "evolution" has become so politically charged as to be untenable IMO. What I am proposing is, I think, testable - falsifiable (though you will likely need much more detail to really understand what I'm saying - more than 25 words). I also think it would be a radical change to current thought in biology. Yet, in the end, if one wanted to be pedantic about it - one could say that what I'm proposing is still evolution.
Limiting the definition of evolution to allele frequency doesn't really get at the essence of what people implicitly mean by the word. I've asked questions about allele frequency before, and people's reaction is, "You're being silly and intentionally difficult." But my point is to show some of the latent meaning not expressed in the definition.
One of those questions would run something like this: I have a population of red roses. I then plant some pink roses in that same garden. The allele frequency has changed. Is that evolution? People roll their eyes, "No, of course not." Ah, but technically it fits the definition ... the short definition. In order to rule out such things, we have to add many, many more words. And what evolution "is" becomes a pedantic exercise in definitions - to a large extent it becomes a power struggle over who controls the word. If this conversation becomes that type of thing ... well ... I'm not interested.