If bare possibility of an omitted link is the disqualifier, what follows by Muslim’s reductio?

The Meeting Condition in Muʿanʿan Hadith: Muslim’s Rejoinder and Route Comparison

• A prior encounter of the pair always suffices
• Explicit hearing of the particular report is needed throughout the chain
• A narrator’s great memory eliminates logical possibility of intermediaries
• Every short chain is proven broken without investigation