they in my comment is purchaser/consumer. you switched the subject to WH/DS. be consistent.
buyers assume risk in their purchases. this is an old concept: caveat emptor. sometimes their purchase does not meet all their expectations ie, not ok. but, it satisfies in aggregate the demand of the purchaser ie, they tolerate it.
Aquinas is said to have indicated that if a vendor knew of a defect in the sold item, it was a sin and the sale was void. conversely, if the buyer realized he received more than paid for, he should recompense the vendor. (ever think of sending extra money to software studio for a game that you judge to be the dog’s bolllocks?) it’s a world view of trade during medieval times* that has some appeal but it’s not for the most part enforceable in today’s world.
*-can’t speak about Bohemia specifically but trade was not held in high esteem during medieval times
to me, that falls under the category of due diligence. i said ‘hmm’ meaning i have doubts. my dissatisfaction with the QA/QC is expressed on these forums