I am getting pretty good with a basic understanding of brewing and I am really trying to understand a few things that I can't wrap my head around. My understanding is higher temperature + shorter time = higher final gravity and lower temperature + longer time = lower final gravity. Is this correct? If so is there some way to know the effect? For example what would be the effect on a 1.040 OG brewed at 155° for 60 min as opposed to 150° for 90 min?