Evidence first
A product shows where what it tells you came from, or it says plainly that it does not know. Where the ground is thin, it says so rather than rounding up to something that sounds more useful.
This is an architectural choice, not a tone of voice. The decision about what is true is moved out of the model and into a step you can inspect.
In practice
Telli 5 and avenTellix open an answer into its graded sources, claim by claim. avenTelligence shows the demand and capacity behind a recommendation. TradeIntellix shows the mechanics behind a fill, and gives no advice at all.