My answer from the trenches is that it just does not work that way. You have to try out if something works. Something can make sense forever in your head until

My answer from the trenches is that it just does not work that way. You have to try out if something works. Something can make sense forever in your head until you try it in the real world. I'd say not testing your ideas and instead spending forever overthinking/planning them is actually a leading cause of procrastination for PhDs.