I think if you disagree with what someone thinks, or plans to do, the rational response is an argument to persuade them that they are wrong. (This is true irrespectively of whether they were, themselves, arguing, and it goes for the fruit-seller, the wrestler, etc. too.)
Of course if what you want is to acquire fruit from someone or defeat them in wrestling—as opposed to showing them that they are wrong—then you should not use argument, but money/force.
This has led me to ponder the following question:
What is the difference between trying to persuade someone that something is the right or best thing for them to do, and trying to incentivize them to do that thing (by payment, or threats, etc.)?
I do believe there is a difference, but I do not have an adequate account of what the difference is.
Thanks for bringing this problem to my attention.
Hi, thanks for writing this, someone linked me to it on twitter and I wrote a reply there: https://twitter.com/AgnesCallard/status/1277274771735089152?s=20