Why did Abraham think he could get away with a sin he already committed? Why is a half-truth still a lie? How can Abraham be called a prophet? How was Abimelech innocent? What was the significance of Isaac's birth? Should Abraham have sent Hagar and Ishmael away like Sarah wanted? How can Philistines be in Canaan hundreds of years before recorded history has them there? Does this mean scripture isn't infallible?