Is something skipped between "you shouldn't" and "on"? I'm not sure how "on" comes right after "shouldn't".
Answer from a Native speaker
Yeah, I see what you're saying! I'd say it's best to think of it as "on the topic of" or in regards to something. So, "on" the topic of this way of thinking, you shouldn't think like that. Although, the most grammatically correct preposition would probably be "with" and not "on". Ex: I know you shouldn't think like that <with> most things. Ex: I like to take my time with everything. = I like to take my time on everything.
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