What is apparently missed by those who continually charge the WCF contradicts itself is they don't read in context the entire document.
God created everything, knows all things that operate due to his creating them to do so by the laws he established. And that included the implantation of free will. Free will then is the human hearts elective to obey or disobey God's laws set forth for righteousness. Be that we know them or not. As his laws are written in our heart.
God set the stage. He didn't attach strings to the people so he could occupy infinity as the individuals puppeteer.
That sin exists in the world isn't because God created it so as if it is a thing.
Sin exists in the world because God created a righteous plan and then deposited people into it so they could carry out the plan using the added particle that is free agency of the human mind. Born from the mind of creator. And all the while all transpires with God's human creation working at finding their way back to the source from whence they sprang.Regardless of trajectory. Because when all things are God no thing can not be God.
The first descriptions of Sheol, which became hades, and then Gehenna, and then flaming bottomless pit Hell, was absence from the sight and presence of God. Annihilation. Antimatter. The elect, the non-elect. Everything is designed to give its creator the glory.
What's that mean? God's an egoist? Self-absorbed. No, 'my thoughts are not your thoughts'. Rather, the glory that is given God is God defining God. Eternally and brilliantly forever.
CHAPTER IV.
Of Creation.
II. After God had made all other creatures, he created man, male and female, with reasonable and immortal souls, endued with knowledge, righteousness, and true holiness after his own image, having the law of God written in their hearts, and power to fulfill it; and yet under a possibility of transgressing, being left to the liberty of their own will, which was subject unto change. Besides this law written in their hearts, they received a command not to eat of the tree of the knowledge of good and evil; which while they kept were happy in their communion with God, and had dominion over the creatures.
CHAPTER III.
Of God's Eternal Decree.
I. God from all eternity did by the most wise and holy counsel of his own will, freely and unchangeably ordain whatsoever comes to pass; yet so as thereby neither is God the author of sin; nor is violence offered to the will of the creatures, nor is the liberty or contingency of second causes taken away, but rather established.
II. Although God knows whatsoever may or can come to pass, upon all supposed conditions; yet hath he not decreed any thing because he foresaw it as future, as that which would come to pass, upon such conditions.
III. By the decree of God, for the manifestation of his glory, some men and angels are predestinated unto everlasting life, and others foreordained to everlasting death.
IV. These angels and men, thus predestinated and foreordained, are particularly and unchangeably designed; and their number is so certain and definite that it can not be either increased or diminished.
V. Those of mankind that are predestinated unto life, God, before the foundation of the world was laid, according to his eternal and immutable purpose, and the secret counsel and good pleasure of his will, hath chosen in Christ, unto everlasting glory, out of his free grace and love alone, without any foresight of faith or good works, or perseverance in either of them, or any other thing in the creature, as conditions, or causes moving him thereunto; and all to the praise of his glorious grace.
VI. As God hath appointed the elect unto glory, so hath he, by the eternal and most free purpose of his will, foreordained all the means thereunto. Wherefore they who are elected being fallen in Adam are redeemed by Christ, are effectually called unto faith in Christ by his Spirit working in due season; are justified, adopted, sanctified, and kept by his power through faith unto salvation. Neither are any other redeemed by Christ, effectually called, justified, adopted, sanctified, and saved, but the elect only.
VII. The rest of mankind, God was pleased, according to the unsearchable counsel of his own will, whereby he extendeth or withholdeth mercy as he pleaseth, for the glory of his sovereign power over his creatures, to pass by, and to ordain them to dishonor and wrath for their sin, to the praise of his glorious justice.
VIII. The doctrine of this high mystery of predestination is to be handled with special prudence and care, that men attending to the will of God revealed in his Word, and yielding obedience thereunto, may, from the certainty of their effectual vocation, be assured of their eternal election. So shall this doctrine afford matter of praise, reverence, and admiration of God; and of humility, diligence, and abundant consolation to all that sincerely obey the gospel.