Omniscience, Omnipotence, the Fall & Logical Contradictions.

If a father knows that because his son has behaved badly the father will give the boy a good hiding, is the father capable of not giving the boy a good hiding? Obviously! The father just knows that the boy needs a hiding and he, the father, means to give the boy one. The "omnipotence and omniscience are mutually exclusive" argument is weak! God is omnipotent, but this does not mean that He will act at variance with His nature; for example, God CANNOT lie (because it is against His nature - i.e. a self-imposed limit - Titus 1:2) but this does not mean He is not omnipotent