The funny thing here is I originally wrote that it was the lowest floor and, on re-reading it, thought, "no, that's not right" and changed it.
But yeah the point is to set the floor as high as we can, because that's where the true answer is. The floor is as high as we can get it now. It needs to go higher, but we don't know where to set it at.
The floor is not at its highest ever. It's the highest we can peg at the moment.