Question of the week: Since God made Adam and Eve from dirt, as fully formed adults, then would this not be compelling evidence for the young-earth creationist models that claim God made everything else mentioned in Genesis 1 fully formed with the appearance of age?
My answer: You will find a detailed and fully documented response in A Matter of Days, 2nd ed. Anyone can get a free chapter of this book at reasons.org/ross.
Adam and Eve are the unique exceptions among humanity. Neither came from the womb of a woman. Therefore, their size is not an indicator of age. God could instantaneously make any sized human being he wants from the dust of the earth. Reliable indicators of age for a human not born of a woman would be the extent of liver spots on the skin, hair color and hair deterioration, erosion of teeth, cholesterol level in the blood, extent of scar tissue, bone density, blood pressure, and pulse rate recovery after heavy exercise. By these scientific measures, Adam and Eve would have measured brand new on the day that God created them.
God creating with the false appearance of age is not an optional belief for anyone who believes the Bible is the inspired, inerrant Word of God. Since the Bible states multiple times that it is impossible for God to lie or deceive (see Numbers 23:19, 1 Samuel 15:29, Psalm 89:35, Hebrews 6:18) it would be impossible for him to create anything that would measure to be old when in fact it is young.