Originally written in French. Translated by AI — the meaning has been preserved, not the prose.
Short definition
A set of signals of independent origins that lead to the same reading of a customer situation, and whose convergence stands in for proof given that none of them prevails alone.
Full definition
The phrase comes from law, where a body of evidence serves to establish a fact no single item demonstrates: it is the accumulation of concordant elements that carries conviction, and each element taken in isolation stays debatable.
In the articles on this blog, the term is taken up for product arbitration: three interviews conducted in unconnected companies, a sales objection that comes back in another segment, an adoption friction observed by the CSMs, a workaround legible in usage data. Its strength isn't counted in the number of reports but in the number of genuinely independent paths — ten reports from the same channel, at the same accounts, don't make one.
It is also one of the reusable building blocks a product context keeps, just like an atomic note or a glossary: a body of evidence built for one PRD stays available for the next arbitration.
Usage in the field
The term comes into play in defending an opportunity in a prioritization committee, in justifying a segment's stake, and in answering the objection "that's only one customer".
Synonyms and variants
"body of evidence" in its original usage; "converging signals" and "convergence" when the emphasis falls on the mechanism rather than on the object constituted.
Not to be confused with
- Customer signal — information coming from a customer or a market indicating a need, a friction or a constraint, without constituting a decision. The signal is the element; the body of evidence is the set constituted and the relation between its elements.
- Weak signal — a scattered indication of a change nobody has yet phrased as a demand. A body of evidence can contain such signals, but it is also built from explicit signals already named.
- demonstration — the establishment of a fact by a piece of reasoning or a measurement sufficient on its own. A body of evidence makes no claim to that status: it makes a hypothesis hard to set aside, not certain.
- representative sample — a collection built to license a statistical generalization. The body of evidence is worth something for the diversity of its origins, not for representativeness.
Examples
"Proof isn't mathematical certainty. It is built by convergence." — the usage that fixes the status retained here.
The same friction reported by support, worked around in the usage data and raised in a sales meeting: three paths, one destination.
Ambiguities / debates
The independence of the paths is asserted more often than it is verified. In an organization that shares its interpretations continuously, several sources can converge because they are repeating the same reading, and the body of evidence closes on itself without anyone noticing.
A second wobble: the word sometimes serves to dress up a pre-existing conviction after the fact, by gathering the elements that support it and leaving aside those that get in its way.