He clearly was, as it turns out he was wrong. Would anyone one of us do exactly the same thing? Most likely, but then that would also make us foolish for doing so when it turned out that we were wrong to trust them at their word. Was it unreasonable for him to do so? I don't think so. But it is still his responsibility that he decided their word was good enough for HIS customers.
In the case of the supermarkets with nuts, I am pretty certain that a third party can check and accredit suppliers as maintaining a reasonable practice in the matter - in the UK it might well be the Trading Standards or some such. Things do fall through the net, and even in these cases the supermarket can certainly blame the supplier, but they also apologise to their own customers that they let them down.
Just because it is not feasable to do it, does not mean that the responsibility lies elsewhere. The seller is responsible to their customers. End of. You have to do all that feel is required to make sure that your customers are getting what they deserve. How much that is will vary, of course. For example, I buy lard from a very well known Austrian brand from a company that supplies to catering and so on. I am fairly certain it is lard. If it turns out to be something else, I will be responsible to my customers for that. I will of course go to my supplier and they will be responsible to me - but my customers are my own responsibility. It's up to me what I do regarding their expectations and
In the case of the supermarkets with nuts, I am pretty certain that a third party can check and accredit suppliers as maintaining a reasonable practice in the matter - in the UK it might well be the Trading Standards or some such. Things do fall through the net, and even in these cases the supermarket can certainly blame the supplier, but they also apologise to their own customers that they let them down.
Just because it is not feasable to do it, does not mean that the responsibility lies elsewhere. The seller is responsible to their customers. End of. You have to do all that feel is required to make sure that your customers are getting what they deserve. How much that is will vary, of course. For example, I buy lard from a very well known Austrian brand from a company that supplies to catering and so on. I am fairly certain it is lard. If it turns out to be something else, I will be responsible to my customers for that. I will of course go to my supplier and they will be responsible to me - but my customers are my own responsibility. It's up to me what I do regarding their expectations and