You gave ma a supposed real world example where something didn’t happen. I asked how do you know it didn’t happen and you said you don’t know how and you don’t even know if it happened or not. It’s the proof for me being wrong that you decided to cite.

You can prove a negative, it’s difficult so I don’t know why you chose to try to do it but it’s possible. I can prove you weren’t in my house an hour ago by having a recording of my house being empty or a recording of you being somewhere else. In this case a good proof would have been the same price on a receipt for the same product from affected company from before the tax was introduced and now, if enough time has passed for it to take effect. I realize that it’s not reasonable to expect you to have a proof like that but if you can’t disprove my claim then don’t lie by citing “real world examples” and point out the flaw in my logic instead, unless there isn’t one. Otherwise it’s just wishful thinking on your part and basically saying “I think that you’re wrong despite not knowing why and having no reason to think so”.