Lumpy flint figurines may be some of the earliest depictions of real people

[AleksS]

2. Several ways which can be used to corroborate each other

They can radioisotope date organic material found with the inorganic items.

If they can find known-age layers above and below an artifact they can get a relative date (for example if the artifact is found above sediment containing volcanic ash from one known event, and below silt from another known flooding event, it can give a relative age. )

If they find the artifacts mixed with other known-age artifacts it can be good evidence of a particular date.

In some scenarios, radioisotopes other than C14 can be used, some of which can be found in inorganic material.

And there are other methods used as well, but I have to get a kid to soccer practice.

There are many lines of evidence that when looked at together can lead to a very safe, reasonable, and justified conclusion.