"I think all you have established is how the Chrisitans interpret the Bible not that the interpretation is valid."
But I'm not really doing any interpretation. I have pointed to Galatians, but I don't need to limit myself to it by any means. I can just point to the words and let the words speak for themselves. For example, Ephesians 2:8-9
"For it is by grace you have been saved, through faith- and this not from yourselves, it is the gift of God- not by works, so that no one can boast."
That's pretty clear. It goes on...
"For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do."
It requires no interpretation to simply identify that the passage does not say 'works' are unimportant, its clear they are. But they aren't a mechanism for salvation, either.
Or another:
Romans 5:6-8
"You see, at just the right time, when we were still powerless, Christ died for the ungodly. Very rarely will anyone die for a righteous man, though for a good man someone might possibly dare to die. But God demonstrates his own love for us in this: While we were still sinners, Christ died for us."
Again, no interpretation required. It was when we were poweless that God saved us. It's pretty evident what the essential elements of the Christian Gospel is.
Some folks are running around this forum trying to draw distinctions between Jesus and Paul, so I feel compelled to offer some other examples saying the same thing.
Of course, we have John 3:16 saying,
"For God so loved the world, that he gave his only begotten son, that whoever believes in him, should not perish, but have everlasting life."
That doesn't quite get at the 'powerless' part, and it is John talking (not Paul), so let's go further in John to some words of Jesus:
"No one can come to me unless the Father who sent me draws him, and I will raise him up on the last day." John 6:44
Keep this one in mind for a moment. But as you can see, the message is more or less the same across the board, without distinction between Jesus, Paul, or the other disciples.
"The credibility of the LDS church is not hung on the Christian message. I would think that is pretty clear."
Oh, I don't know about it being clear. But when I say such things, I mainly refer to how Mormons use the same language as Christians, call themselves Christians, and spend a lot of time reaching out to the disaffected Christians out there, who are unaware that the words Mormons use sometimes have different meanings and if Mormons are 'Christian' its in a different sense then what is traditionally understood. This allows some people to be comfortable exploring Mormonism, where the chances are good otherwise that the Mormon apologist would not find a hearing at all.
""Quote:
We could accept that every part of the story of Mormonism's origins is true, and yet have good cause to withhold our assent, as independent verification is not only possible, nor is it forthcoming, probably in principle.""
"What? Say that a different way, I don't understand."
In other words, Mormonism's information comes from a source that cannot even in principle be tested or corroborated. As important as it might be to check various aspects of Mormonism for accuracy to the real world, I'm saying that even if it checked out in every case, the source of the information itself is completely cloaked. Since we allow that there can be angels of deception, and we have little way to check this particular angel, we can in intellectual integrity decline to believe in Mormonism.
Contrast that with Christianity, which does not pin its authenticity on a message from an angel, or even prophecies in general, but the specific historical claim that Jesus rose from the dead. Its true that some people think that evidence weak- more power to them. Nonetheless, the principle claim that defines all the rest is in principle testable and falsifiable, and in that sense superior to Mormonism, and Islam for that matter, too.
"Let's talk about salvation then. I will use your shipwreck analogy. The ship is sunk and here we all are bobbing in the water. Only we are not unconscious."
No one can come to the father unless they are drawn. It was while we were still powerless that Christ died for us. We are not saved by works. I appreciate your candor in explaining the Mormon Gospel, but you can see that right here is a fundamental difference between the two Gospels. Its not ambiguous in the Christian scriptures: we were powerless.
"Even that rift doesn't sound like a perversion of the Gospel."
Maybe not a perversion of the Mormon Gospel, but a perversion of the Christian Gospel.

Have you read the book of Romans lately? Romans 1-8 is really a presentation of the whole Christian Gospel message. It begins with our sin, and being 'dead' in it (dead=powerless), and points out that everyone was in this condition. Then it explains how God interceded, and how afterwards, the power of the Holy Spirit works to transform us.
I suggest it.