Hi and welcome Gungho!
Here are some verses (of many) which attest to God's knowledge of all things.
Also, this paper from Ray is extremely enlightening in regard to God's infinite understanding and perfect plan.
Exposing Those Who Contradict;
Part 4 (GOOD AND EVIL) http://bible-truths.com/part4.htmJob 37:14 Hearken unto this, O Job: stand still, and consider the wondrous works of God.
Job 37:15 Dost thou know when God disposed them, and caused the light of his cloud to shine?
Job 37:16 Dost thou know the balancings of the clouds, the wondrous works of him which is perfect in knowledge?
Psa 139:1 To the chief Musician, A Psalm of David. O LORD, thou hast searched me, and known me.
Psa 139:2 Thou knowest my downsitting and mine uprising, thou understandest my thought afar off.
Psa 139:3 Thou compassest my path and my lying down, and art acquainted with all my ways.
Psa 139:4 For there is not a word in my tongue, but, lo, O LORD, thou knowest it altogether.
Psa 139:5 Thou hast beset me behind and before, and laid thine hand upon me.
Psa 139:6 Such knowledge is too wonderful for me; it is high, I cannot attain unto it.
Psa 139:7 Whither shall I go from thy spirit? or whither shall I flee from thy presence?
Psa 139:8 If I ascend up into heaven, thou art there: if I make my bed in hell, behold, thou art there.
Psa 147:5 Great is our Lord, and of great power: his understanding is infinite.
Pro 15:3 The eyes of the LORD are in every place, beholding the evil and the good.
1Jo 3:20 For if our heart condemn us, God is greater than our heart, and knoweth all things.
Attempting to change another person's thought on this matter often proves to be futile unless of course they are sincerely seeking His truth rather than a carnal defense of what they hold dear.
We know that God Himself will send strong delusion:2Th 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
What may appear to be obvious to the natural mind is in fact a riddle placed by God that speaks only to those He chooses to reveal Himself and His Word to, try telling that to the JW's!
But here it is;Eze 17:2 Son of man, put forth a riddle, and speak a parable unto the house of Israel;
Mat 13:10 And the disciples came, and said unto him, Why speakest thou unto them in parables?
Mat 13:11 He answered and said unto them,
Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
I will close with this as it really sums it all up; Isa 28:21 For the LORD shall rise up as in mount Perazim, he shall be wroth as in the valley of Gibeon, that he may do his work,
his strange work; and bring to pass his act,
his strange act.
Peace,
Joe