It&#x27;s no different than categorically stating that something is safe, simply because evidence of harm is yet to be found. See thalidomide, tobacco, DDT, and a host of others.<p>So, to the extent that both sides are being &quot;unreasonable&quot; in demanding proof, the difference is that we are moving forward with one side&#x27;s thesis. In doing so, we are exposing people en masse to the risk of their being wrong.