accurately weighing objects?
Ok so if you were to pick up an anvil, you would know that it weighs more than a 1kg bag of sugar because you remember what that bag felt like, and you can compare the weight of the anvil to the memory of the sugar. So my question is, would it be possible to refine that skill, and teach yourself to think "ok it weighs more than 5g, but less than 10g, so it must be around 7.5g". I imagine this would involve a bunch of test weights to memorise, probably using some fancy mind palace or something. Do you guys think this is possible?