本屋で見かけて、
表紙に蛇の回転錯視が使われてるというだけで購買欲そそられ購入。
使用されてることを北岡先生はご存知なのか。。。
#蛇の回転錯視
#不能犯pic.twitter.com/QjB2NUmy0K
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