There is not the slightest possibility that a modern human would have offspring with an ape.
Evolutionists assume that such an event was possible at some point many thousands of years ago.
What do evolutionists base this assumption on?
Humans pretty much *always* have offspring with apes since humans *are* apes.
Mmmh. I don't know what the difference is between what I call "species" and you call "related species".
It is possible, for example, for two species that are closely related (a recent divergence from a common ancestor) to be able to interbreed. usually, this does NOT produce fertile offspring, but it can happen.
So is the theory of gravity. Both are theories that are well supported by the evidence.
A population is made up of individuals, and a community is made up of couples. If there are no like-minded individuals and couples, the community or population does not have the slightest possibility of emerging.
Changes of species happens over the course of many generations. it isn't an individual thing.
An analogy is found with languages. Nobody spoke French 2000 years ago. But the Latin language, over time, changed in meanings and pronunciation to the place that no original Latin speaker would be able to understand a modern French speaker or vice versa,.
But, at each generation, everyone understood those around them. There was no 'first French speaker'. There were always 'like minded individuals' that were able to speak to each other. But the beginning and end points are different languages.
In the same way, populations change genetically over time. The population always has variations and there are always 'like minded' individuals that will breed to make the next generation. But, over time and generations, the characteristics of the population chage to the point that the end and beginning populations are different species.
If no two apes "comparable to humans" existed in the same place and time, how could a community of human apes have emerged?
See above.