Re: Creationists
Peace philosophy
Common sense is not the right answer when people are asking for a scientific explanation … Besides - that sense you find so easily to establish I am finding very hard to establish … And I think of myself a person with common sense in abundance.
Why should time and variation within a species lead to speciation? What has “time” to do with it? Why should variation create speciation? How many variants of hominid were there that led to our existence? I can bet not more than 5 to 10 variants of hominid we have identified are already extinct - According to the way you say it … lots of variants are needed for speciation … is 5 to 10 a high number or low number of variants? Then each variant needs to have come about from about around the same number too … surely?
In fact what you have said regarding “if enough variation is present” then the idea of humans and chimps sharing a common ancestor is bleak, because then effectively we are saying one type does not become two new types until there are many variants of that type in existence and continue to vary generation on generation …
You know variation is reversible? Yes, we can reverse variation to acquire the predecessor phenotype … Furthermore, the predecessors will readily procreate with the variants …
When, why and how scientifically does it becomes impossible for two related specimens to become biologically incompatible? I think the question is a common sense one to ask …
I think the mechanism that is being subjected for people to put their faith in is this:
Two different environments for two sub-cultures of the same creature … So each adapts to its own environment … So the question here is does environment lead to the changing of a creature? How does that happen? How long does it take? What factors will make it fast or slow? How genetically speaking does that change take place?