Talk:Gold efficiency/@comment-24281669-20170103021942/@comment-33055093-20170908044701

Basically they mean that they can't take into account how much of the stat the bonus is BASED off of you have, but they can figure out how much you'll have FROM IT. So for Manamune, you get AD for your mana, but they can't know how much mana you have, but they CAN take into account that Manamune itself gives you 250-1000, depending on stacks. So they take that 250-1000 into account when calculating it, but not any OTHER mana you would have.