並前往https://books.google.com.tw/books?id=Y6QFEAAAQBAJ&pg=PP16&lpg=PP16&dq=The+first+step+is+to+establish+that+something+is+possible+then+probability+will+occur+%E4%B8%AD%E6%96%87&source=bl&ots=rV8LNrK7zs&sig=ACfU3U283VtCqEiLBKKhSg1A2KH9RW1s4g&hl=zh-TW&sa=X&ved=2ahUKEwicgYTir-qBAxXJrlYBHe5zCHsQ6AF6BAgoEAM