2-1a6b1 Animals can extrapolate—but can never realize its contingencies

In other words, other life-forms can never think of Black Swan events.

Our ability to handle symbols implies Black Swans—they are two sides of the same coin.

他の動物も類推はできるが、飛躍は人間にしかできない。

10-2g2c Indexes are physical because they merely ‘indicate’ and hence do not require culture. Symbols are cultural. Put differently, indexes are analog and symbols digital.