&gt;  If you extend this to the now-debunked notion&#x27;s common usage as an metaphor for the uniqueness of people, I&#x27;d say it&#x27;s safe to say we&#x27;re primarily products of our unique environments and anyone brought up under the same conditions as us has a good chance of turning out just like us.<p>This is the old &#x27;nature vs. nurture&#x27; debate, and while it&#x27;s pretty much impossible to decide perfectly due to the practical challenges to creating a proper controlled experiment at scale, it&#x27;s pretty much accepted by this point that the answer is &#x27;yes, both matter&#x27;.