Hi Vanderhoven7,
"The fact that some of the Gentiles in Corinth did not subscribe to the (general) resurrection of the body does not reflect upon the actual testimony of the apostles or the 500 who attested to having witnessed Christ's post-resurrection appearances in and around Jerusalem. . . . But, like Hymenaeus and Philetus, their error reflects only on themselves."
Unfortunately Paul does not elaborate in 1 Cor 15 who the "some" were. Perhaps, they were Christian leaders in Corinth who preached an anti-resurrection message. Certainly we know Paul talked about "super-fine apostles" he disagreed with elsewhere. To be exact, we can't say we have the testimony of " more than five hundred of the brothers and sisters " (verse 2). Instead what we must say is the author of Corinthians, who we generally agree was Paul, was making this claim.
Eyewitness testimony itself can be problematic. The shocking and sudden demise of Jesus could have had a profound impact on the community of believers. A small assembly of 500 listening to someone speak of Jesus message could over time easily has transformed into a story of him really being there. Certainly we know religious folks with sufficient motivation give questionable testimony -- otherwise we would be compelled to conclude people near Joseph Smith really saw and handled the gold plates.
Nonetheless, I do give some weight to this aspect of Paul's argument. But from there he goes downhill rather quickly...
" If there is no resurrection of the dead, then not even Christ has been raised. 14 And if Christ has not been raised, our preaching is useless and so is your faith. " (1 Cor 15:13, 14)
Here Paul is basically arguing that resurrection of Christ happened, because such is required for their preaching and faith. Such circular reasoning weakens his argument. Finally Paul concludes with these words...
Do not be misled: “Bad company corrupts good character.” [ e ] 34 Come back to your senses as you ought, and stop sinning; for there are some who are ignorant of God—I say this to your shame. (1 Cor 15:33, 34)
This is not the sign of good argument! To suggest belief depends, not on evidence, but rather avoding "bad company" and tied up in "sin" and "shame" is not impressive.
These are my views of course, and you likely would put weight on different aspects of the account. That's the personal challenge to parse through this material and various viewpoints in an effort to reach a reasonable conclusion.
Cheers,
-Randy