{"type":"rich","height":"190","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frskmt.hateblo.jp%2Fentry%2F20090628%2F1246190420\" title=\"SICP\u6f14\u7fd2\u554f\u984c4.39,4.40,4.41,4.42 - \u3055\u304b\u3082\u3068\u306e\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["SICP"],"width":"100%","version":"1.0","published":"2009-06-28 21:00:20","blog_url":"https://rskmt.hateblo.jp/","title":"SICP\u6f14\u7fd2\u554f\u984c4.39,4.40,4.41,4.42","author_url":"https://blog.hatena.ne.jp/rsakamot/","url":"https://rskmt.hateblo.jp/entry/20090628/1246190420","blog_title":"\u3055\u304b\u3082\u3068\u306e\u30d6\u30ed\u30b0","author_name":"rsakamot","description":"4.38\u306f\u30d1\u30b9\uff0e\u3081\u3093\u3069\u30fc\uff0e 4.39 \u5f71\u97ff\u3057\u306a\u3044(\u306f\u305a) 4.40 backer\u305f\u3061\u304c\u305d\u3082\u305d\u3082\u3059\u307e\u306a\u3044\u3068\u3053\u308d\u306f\uff0c\u59cb\u3081\u304b\u3089\u30ea\u30b9\u30c8\u306b\u5165\u308c\u306a\u3044\uff0e ;exercise4.40 (define (multiple-dwelling) (let ((cooper (amb 2 3 4 5)) (miller (amb 1 2 3 4 5))) (require (not (= cooper miller))) (require (> miller cooper)) (let ((smith (amb 1 2 3 4 5))) (require (not (= smith cooper))) (requir\u2026"}