[SOLVED] The "Empirical Evidence" sidearm does not refer to a Salt Gun. It is a chemistry reference for the process of finding the EMPIRICAL formula (list of the basic elements) for something through combustion analysis (burn it). But there's a more specific hint of the meaning by using the elements, name "empirical evidence" and way/order the set of numbers on of the back of the gun, and what numbers represented: [b]16 17[/b]...the atomic number for Sulfur (S) , chlorine (Cl) [b]32.066[/b] = atomic weight of Sulfur (S) [b]11[/b] = atomic number for Sodium (Na) [b]200.59[/b] = atomic weight of Mercury (Hg) The above placement of these numbers are very similar to [url=https://pubmed.ncbi.nlm.nih.gov/3439912/]published NIH** medical science experiments[/url] showing (empirical evidence) using different solution combinations of Sodium(Na) with either Chlorine(Cl), or Sulfur(S) to show how quickly Mercury can be removed from inner ear tissue samples stored in a preservative solution. *hint, hint* The two solutions used were Sodium (11) with either Sulfur(Na2S = 11+16) and Chlorine(NaCl 11+17) The result (empirical evidence) published was ... [quote]" ..rapid elimination of Hg from auditory ossicles stored in preservatives containing Hg, our studies show ... the extraction of Hg is quicker in sodium sulfide than in an isotonic solution of sodium chloride."[/quote] I think it's an easter egg that says, "This Gun is evidence we tried our best to preserve Mercury but couldn't, and now we'd like to stop hearing about removing Mercury" ** [url]https://pubmed.ncbi.nlm.nih.gov/3439912/ [/url]