Today I discovered that if I sit down for six hours and do maths without a significant break, my brain pretty much stops working.
That might be why the first four questions of my Astronomy assignment worked out beautifully, but the fifth one simply wouldn't come together. I might be why I wrote a blog post and then wondered what I was trying to say when I reread it. It is definitely a good reason for me to go to bed and stop trying to be intelligent until I've had some sleep.
I'm very excited that my coursework has arrived, but I'll have to be coherent about it another day!