There's only one cogent case to present.
1Co 1:21 WEB For seeing that in the wisdom of God, the world through its wisdom didn’t know God, it was God’s good pleasure through the foolishness of the preaching to save those who believe.
Jesus summed it up like this.
Joh 3:16-21 WEB 16 For God so loved the world, that he gave his only born Son, that whoever believes in him should not perish, but have eternal life. 17 For God didn’t send his Son into the world to judge the world, but that the world should be saved through him. 18 He who believes in him is not judged. He who doesn’t believe has been judged already, because he has not believed in the name of the only born Son of God. 19 This is the judgment, that the light has come into the world, and men loved the darkness rather than the light; for their works were evil. 20 For everyone who does evil hates the light, and doesn’t come to the light, lest his works would be exposed. 21 But he who does the truth comes to the light, that his works may be revealed, that they have been done in God.”
Paul describes it as follows
1Co 15:3-10 WEB 3 For I delivered to you first of all that which I also received: that Christ died for our sins according to the Scriptures, 4 that he was buried, that he was raised on the third day according to the Scriptures, 5 and that he appeared to Cephas, then to the twelve.
So, if you actually think that the cogency is dependent on your design, then you're screwed.
Repent and believe the gospel of Jesus.