Zeph Smith, A student of society and humanity
Suppose you are eating lunch at a fast food restaurant, or awaiting an appointment in an office building, on an ordinary day with dozens of ordinary people around you. What are the chances that your life may be in danger in the next few minutes? Usually extremely small;
Now suppose that an un-uniformed stranger carrying a military style rifle and a large ammo clip walks in and starts looking around.
More likely than not, you will remain unharmed; they may be a responsible gun lover promoting open carry and looking for a restroom, or there may be other innocent explanations. There are way more law abiding open carry advocates than mass killers, after all.
But rationally, did your chance of being harmed soon just drop or rise, on the whole?

(回答一)假设在普通的一天,你正在一家快餐店吃午饭,或者在办公楼里等待预约,身边有几十个普通人。在接下来的几分钟里你有多大可能会有生命危险?一般来讲概率非常小
现在假设一个非官方组织的陌生人,拿着一支军用步枪,步枪上装着大号弹夹走了进来,开始四处张望。
你可能不会受到伤害;因为他可能是一个负责任的提倡公开携带枪支的枪支爱好者,他只是在寻找洗手间,或者可能有其他正常的理由。毕竟,守法的公开枪支携带者远比枪击犯多。
但理性地说,总体上看,你被伤害的几率是下降了还是上升了?

That vigilance/nervousness is not a misfiring instinct based on ignorance, it's consistent with rational self protection. If you don't get more nervous, there's something wrong with your amygdala and your survival instincts need tuning.
Let's take it a bit further. Suppose you had a traffic scuffle and an angry confrontation ensues; you are really upset and want the other person to take what you think is their responsibility, which they are not doing. If the other person is carrying a holstered pistol, how is that going to affect your behavior? Is it going to cross your mind that this fellow citizen just might use that pistol in their anger? Or would you be wise to trust that outcome to be highly unlikely and nothing to be nervous about? Does your answer substantially vary if you own and like guns (but are unarmed now)?
Basically any time a stranger openly carries around the means to kill or mutilate you in seconds - deliberately or accidentally - and you have no context of relative safety (eg: a gun range or hunting trip), it's survival positive to be wary. Just as you'd be wary if there were a 50 foot deep hole in your living room with no railing

警觉/紧张并不是一种失败的本能,它是一种自我保护本能。如果你没有变得更紧张,那么你的杏仁核就有问题了,你的生存本能需要加强。
让我们再深入一点。假设你卷入了一场交通摩擦,随之而来的是一场愤怒的对峙;你真的很沮丧,因为你认为他们要负全部责任,但他们并没有这么做。如果对方身上带着枪,这将如何影响你接下来的行为?你有没有想过这个公民可能会在愤怒时用那把枪?或者,你会冷静地相信这种结果发生的可能性很低,无需为此感到紧张吗?如果你拥有并喜欢枪支(但在对峙时没有武器),你的答案会改变吗?
基本上,任何时候当一个陌生人公开携带着可以在几秒钟内杀死或伤害你的武器——有意或无意——并且是在不那么相对安全的环境中(安全的环境如:射击场或狩猎旅行),保持警惕都是积极的生存手段。就像如果你的客厅里有一个没有栏杆的50英尺深的大洞,你会时刻保持警惕一样。