This notion of &quot;normal random mutation&quot; does not mean anything in terms of molecular biology or genetics. It is equivalent to &quot;Bad Luck&quot;, or &quot;mutation triggered by something&quot;. The phrase is inappropriately vague because it equates point mutations, insertion mutations and deletion mutations.<p>As a rule,do not write about data with the modifier &quot;normal random&quot;, write &quot;normally distributed&quot; instead; and then make sure that finding is worth mentioning in some field of science.