I'm familiar with the Mormon apologetics defending the plate witnesses, which is different in scope, purpose and intent that the lengthy New Testament documents (and contain no prophecies within, either).
I think you may be referring to when Paul was bitten by a poisonous snake and showed no ill effects in the Acts? Some people have natural immunity to certain toxins, I would think. What is the big deal and why aren't we instead investigating Jesus's resurrection?
The Mormon testimony is signed and sworn to
before God, which puts it a notch above anything
from the NT.
But regardless; the rhetorical thing about why would they
"die for a lie" etc really just does not impress
anyone but the already convinced. You can save
yourself the effort.
As for the snake story, it appears you never thought
about it much. I would not have either, but my boyfriend
of years ago was a herpetologist.
And, of course, a scientist-as to a lot of other
people-knows that focusing in intensely on a
small thing can reveal a great deal about a far
larger picture.
Feynman, among others, noted that if you knew
all there is to know about a drop of water you'd
have most of the secrets of the universe.
So-snake story. If it is "fishy", what does that tell you?
Let;s see if it is.
First detail-there are no vipers or other poisonous
snakes on that island.
You may have to go extra-biblical to explain how
there was one where there aren't any.
Oh and dont bother with the "natural immunity".
Doesn't happen. That is just made up.
And it would spoil the story, no?
For lo, the point of the whole story was to show
"Paul" was under "God's" protection.
Another detail- A viper strikes so fast, all you
see is a flicker of movement. So IF you get
bitten by one, it does not "cling" as per
story.
There is a lot more wrong with the story. You
read it, try to visualize the whole situation.
See if you see anything that does sound
realistic. There is quite a list, so you should
be able to see some of them.