Leap
Verdicts and auditsalso: leaps · where the reasoning is carried by something unstated · what is missing · how to closeA step of the chain that needs something neither the chain nor the read sources supply: a signpost to the reader, not a verdict on the science.
The chain explanation lists every leap under the heading "Where the reasoning is carried by something unstated", each with the stage it occurs at, what is missing and how it could be closed. A leap-free chain is not the goal; a chain whose leaps are named is.