I don't know why language functions are so much harder for me than other brain functions. I have no problem doing many tasks for long periods like programming from morning to morning, and visual spatial comes so easily and doesn't ever go bad, but I find it hard to write a paragraph to summarize something, and language is first to go when I am tired.
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Drain and plane and grain and blain your brain, and then again,
Propane and butane out of the gas main, your blain shall sustain!