There is one thing i always wanted to ask. Since when HUP is so 'easily' allowed to explain the obvious non-conservation of energy? With what justification we say with such an ease that a particle can borrow(wtf does that mean?) energy ΔΕ but it must return it(what...??) in time Δτ? I really please someone with real knowledge of these things to explain it to me, because all the introductory books use such arguments but none really explains why they should hold.