All infants begin to smile at 46 weeks post conception regardless of how long they have been exposed to smiling faces.This is evidence that emotions are:

Question

Quizplus · Accepted Answer

The fact that infants begin to smile at a specific time post conception, regardless of environmental exposure, suggests that this behavior is innate, meaning it is a natural part of their development rather than learned from their surroundings.

All Infants Begin to Smile at 46 Weeks Post Conception