Recent content by Pengo

apeiron, Is this really a good criticism? I ask because it seems that in any scientific or even philosophical theory, the search always stops somewhere with that which "just is, period". Fundamental forces, for example. I can understand the idea that we should be very reluctant to add new...

Right, which seems to be what Feynman is saying (and what he says in the paragraph preceding the quote): He's happy to treat energy as an abstract concept used to work out calculations and make predictions and so on, a conserved quantity in a calculation. It has utility as that concept. But then...

I don't know. Did Feynman think that when he said "we have no knowledge of what energy is"?

Pardon me if this is the wrong section for this question, but "energy" seemed like a topic that could fit in almost any category on this site. Either way, I'm sure many people on here have seen this quote by Feynman: Is Feynman correct about this? Because the way Feynman puts this, it...