Final answer:
The function and meaning of the art found on the walls at Lascaux have not been thoroughly deciphered; various theories exist, but they remain speculative.
Step-by-step explanation:
The statement that the art found on the walls at Lascaux has been thoroughly deciphered as to its function and meaning is false. While there have been various theories about why prehistoric people painted and engraved the walls at Lascaux, these are mostly speculative. Henri Breuil's theory of 'hunting magic' suggests that images might have been created during rituals to ensure a successful hunt. Other scholars consider the possibility of shamanistic activities or that the images could represent narratives or star charts. The consensus is that the exact function and meaning of the Lascaux cave paintings remain a mystery, and interpretations are largely conjectural based on partial evidence.