Even you know why your argument fails. You started your example with an admission. It in no way relates to the circumstances being discussed. Let me refresh your failing memory. You said:
If two unrelated people admit to staying unchaperoned in the same house overnight, with no exceptional circumstances, they are liable to be disfellowshipped for fornication.
See, you started with an admission. Withesses not needed. I laid out many scenarios, from the branch, that explain many circumstances under which even two witnesses are not admissible and the circumstantial evidance isnt taken as fornication.
Its not that there isnt a point to be made but the reality is, it isnt being made. Draw the analogy. What circumstantial evidence SHOULD lead one to believe that an act of pedophilia has been committed? A child spends the night at a house with somone who isnt a relative? Can you not see how that would be HUGELY problematic? Lets extend it... a simple accusation? The accusation alone isnt enough for fornication nor is it enough for pedophilia. Where do you want the line? Ive been clear already. For me the line and the answer is, was and will always be: call. The. Police.
The real issue is that sex between consenting adults is viewed as a private matter and nobody cares unless they being cheated on where as pedophilia is a sick twisted crime that most civilized people want to see stamped out and the perpetrators executed. Its creates intense emotions and people generally want to run with any accusation as completely factual. Thats also not practical or logical for a religion, with no right to enforce law, no training to investigate and no mandiate to be involved in the first place.
I am sorry that fact based logic makes it difficult for you to participate here. Im sure there are self help books that can provide tools for coping. If all this thread is about is to shout into the echo chamber and have like voices agree, congratulations. If this thread is about trying to construct an argument and drawn a comparison between their dealings on adultry and their dealings on pedophilia for dispassionate observers, its been ineffective.