Let's have a look at the Madist's favorite passage of scripture - 1Cor 15:1-4
1 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; 2 By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. 3 For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; 4 And that he was buried, and that he rose again the third day according to the scriptures:
The Madist reads this and says to him/herself...."this was a different gospel that was exclusively given to Paul for the gentiles", and was not revealed to the other apostles. However, Paul had explained that he was the Corinthians father in the Lord, as he was the one who brought the gospel to them.
Now lets continue on with the passage.........
5 And that he was seen of Cephas, then of the twelve: 6 After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep. 7 After that, he was seen of James; then of all the apostles. 8 And last of all he was seen of me also, as of one born out of due time. 9 For I am the least of the apostles, that am not meet to be called an apostle, because I persecuted the church of God. 10 But by the grace of God I am what I am: and his grace which was bestowed upon me was not in vain; but I laboured more abundantly than they all: yet not I, but the grace of God which was with me. 11 Therefore whether it were I or they, so we preach, and so ye believed.
Paul here says that, "whether it is I or they (the other apostles), so we (plural) preach, and so ye believe."
Paul puts little relevance on who the preacher was to the Corinthians, which is devastating to the madist opinion that Paul was ordained to be the chosen minister of an exclusive gospel to the gentiles.
No he wasn't.
The "we" indicates that the other apostles preached the same message, and if the Corinthians happened to hear it first from Paul, it was no big deal. The fact that it was preached by all the apostles , and that they believed it through Paul, was all that mattered.