We can’t maintain fast thinking and precise thinking at the same time. There’s a tradeoff. Let me explain, when you read a sentence, you can grasp the meaning of that sentence. But, you don’t really care about the meaning of each word, or in more precise manner, you don’t even read each alphabet. How many alphabet m you’ve read up until this point? You don’t really care right? Because, our brain has tendency to automate common repeatable things (in this case, the individual word meaning or the alphabet) and only focus on the things that we think it matters (in this case, the meaning of whole sentence).