The philosopher Arthur Schopenhauer said that those who don't wonder about the contingency of their existence, of the contingency of the world's existence, are mentally deficient.
Filosofi Arthur Schopenhauer sanoi, että ne, jotka eivät pohdi  olemassaolonsa sattumanvaraisuutta, tai maailman olemassaolon  sattumanvaraisuutta, ovat älyllisesti vajaita.