Hmm, adding oats to soup might make it a bit too gooey for the palate. Kinda like too much boiled okra in the stewed tomatoes. Oats make a good porridge, and a healthier Congee than rice.

Haggus may be taking things too far, though. I prefer a less Spartan diet.
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)