2. Bigfoot 大腳

For decades, large, hairy, manlike beasts called Bigfoot have occasionally been reported by eyewitnesses across America. Despite the thousands of Bigfoot that must exist for a breeding population, not a single body has been found. Not one has been killed by a hunter, struck dead by a speeding car, or even died of natural causes. In the absence of hard evidence like teeth or bones, support comes down to eyewitness sightings and ambiguous photos and films. Since it is logically impossible to prove a universal negative, science will never be able to prove that creatures like Bigfoot and the Loch Ness monster do not exist, and it is possible that these mysterious beasts lurk far from prying eyes.

幾十年當中，美國各地都不時有目擊者聲稱自己看到了人稱“大腳”的巨型多毛人形野獸。盡管目擊者口中的“大腳”數以千計、足以構成一個繁殖種群，人們卻連一具尸體也未曾找到。沒有一個“大腳”被獵人殺死或是被超速的汽車撞死，連自然死亡的都沒有。沒有牙齒骨骼之類的實在證物，“大腳”存在的依據只是證人目擊以及模糊不清的照片和錄像。要證明一個全稱否定判斷從邏輯上說是不可能的，因此科學將永遠不能證明“大腳”和尼斯湖怪獸之類的東西不存在。也有可能，這些神秘莫測的生物的確潛藏在人們好奇視線之外的遠處。