'Really' in the Bible

Now the serpent was more subtle than any animal of the field which Yahweh God had made. He said to the woman, "Has God really said, 'You shall not eat of any tree of the garden?'"

Yahweh said to Abraham, "Why did Sarah laugh, saying, 'Will I really bear a child, yet I am old?'

Isaac said to Jacob, "Please come near, that I may feel you, my son, whether you are really my son Esau or not."

He said, "Are you really my son Esau?" He said, "I am."