Question

how can you prove that early man night have started to cook food​

Answer 1

Early humans may have started cooking their food at some point between 800,000 and 1.2 million years ago, according to scientists who have found the earliest evidence of raw food eaten by our prehistoric ancestors. Archaeologists extracted microfossils from dental plaque dating back to 1.2 million years.

Answer 2

there is nothing to say that cooking all time in restaurant