Product Backlog definition: change “known to be needed” to better reflect empiricism and uncertainty
Consider changing the first sentence of the definition of the Product Backlog to better reflect empiricism and the uncertainty of complex product development.
The current sentence is as follows: "The Product Backlog is an ordered list of everything that is known to be needed in the product."
Consider changing the word "known" to "believed," "anticipated," or "hypothesized" - or some other way of conveying that the Product Backlog contains planned experiments to be validated through delivery of "Done" Increments and subsequent market feedback (if and when released). We don't know up front for certain what is needed.