A: The wording on Let’s Simplify is as clear as we could make it. If we had said that you may discard up to half of the New Rules in play, and there were an odd number (for example, five of them) you wouldn’t know whether you could should round up or down. But we tell you that you should ROUND UP when figuring out what “half” is, so in this example, you know you can discard up to three.
Of course, you may discard up to half – you don’t have to discard three; you could choose to discard just one or two, or even zero if you want. Those numbers are all less than “half (rounded up) of five”.