Buffering Your Statement or Idea

At the risk of sounding naive,

Don't quote me on this, but

Even though

For arguments sake, let's just say that

From my lay perspective,

I could be wrong, but

I may have missed something here, but

Just suppose for a minute that

Now, correct me if I'm wrong, but

Perhaps it's already been mentioned, but

Unless I don't have the whole story,

While I'm aware that