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This is a yes from me, it is my area of research, a common set of symbols can be found in flint tools of certain age and figurative finds found in connection with said tools. It cannot be proven they were used to communicate but that is what logic dictates, they could have been used for teaching the names of the animals etc..
:- https://eoliths.blogspot.com/
These are not like the symbols found by Genevieve von Petzinger, but are commonly of animal face profiles, half side on views and full side on views, they are often quite subtle but accurate descriptions can be found. Each item often holds numerous descriptions. The items are properly known as Figure stones or Pierre's figures, but in the US they go by the name portable rock art.
Common symbols are:- Thumb/Finger, Hand, Foot, Bear, Elephant/Mammoth, Bird, Feline, Phallus, Ape, Hooded Figure, Horse.
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