Dear Tom,
This is not about your main point, but since you mentioned "communication skills", here is something that will strengthen your presentation of the truth.
You said that the comments on the site were largely subjective in nature--which I don't doubt, since many blogs, the product of incurably self-absorbed people, do tend in that direction--and you clearly wanted to present a more objective argument. But then your own opening sentences themselves begin subjectively as well!
The way I look at this topic is ...and
What is more important however to me is ... Let me urge you, brother, to avoid the compulsion to feel that you have to begin a declaration of undisputed truth by including a statement of how it makes you feel! Because at face value at least, that consigns your arguments, however well expressed, to the same level of subjectivity as all the others.
Your argument would have carried more weight had it begun without those qualifiers, like this:
It is impossible to go into the topic without our own presuppositions. If the God that the Scripture's proclaim is real, then He and He only can ultimately reveal Himself to His creatures.
The presuppositionalist will never describe any essential points of doctrine subjectively, knowing that the Scripture is always true, whether the hearer accepts it or not; proclaiming universal truth in subjective terms concedes any ability to apply it objectively to the unbeliever.
Arrgh! Now I see you did it again before your closing thought!
It might be just my perception, but it seems to me ... Now granted that was not describing a universal truth, but Tom, you end up shooting your arguments in the foot when you feel you have to qualify so much of what you say in this way. Why not rather simply state the things you are certain of?
