"Concious" is defined in the standard way: There is something it is like to be a baby. They have qualia, they have subjective experiences. Whatever it is that adult human philosophers believe themselves to have.

This is about the average human baby, 1 week after birth. The existance of some outlier babies is not relevant.

This market resolves once neuroscience is solved, and it seems we're going to have as good an answer as we're ever going to get.