- Type One's motto: "Let pure skepticism be your guide."
- Type Two's motto: "Let pure faith be your guide."
- Type Three's motto: "Let pure logic be your guide."
From the abstract of Schumacher's Etruscan and Rhaetic inscriptions from a linguistic and epigraphic point of view (1970), we'd think that pursuing a relationship between Etruscan and Rhaetic is utterly futile:
- "Une parentée entre les langues rhètes et la langue étrusque ne peut être démontrée." (Translation: "A relationship between the Rhaetic and Etruscan languages cannot be demonstrated.")
The most obvious example showing that we're dealing with an Etruscan-related language is in the following artifact (found on this page of the previously mentioned site):
kusenkus trinaχe, for example, running upwards on the left-hand side. The last word of that phrase is a verb directly related to the same verb found in Etruscan (trin [LL 7.ii] , trinθ [LL 7.iv], trinθaśa [LL 7.vi]) which often takes the object vinum "wine". So as in the Liber Linteus, the verb on this Rhaetic inscription must also be in reference to the act of pouring a libation to the gods. The fact that it is a bronze situla reinforces this interpretation. To add even further to this, a recognizable name of a deity is found on the righthand side, Velχanu, which must surely be equivalent to the chthonic Etruscan deity Velχans (Roman Vulcan, Greek Hephaestus).
On the artifact labeled Schum. NO 3, dative endings are clearly identifiable on a couple of names (Φeluriesi Φelvinuale) inscribed in a brief inscription on a votive offering. Rhaetic's counterpart to Etruscan's "dative II" ending, -ale, surfaces once again in Schum. BZ 3.
Schum. PU 1 is particularly intelligible to an Etruscophile. Beginning the sentence is the word iχ "thus", then there is the name Φelturie in the genitive case (compare the Etruscan name Velθur in TLE 38, 43, 92, 125, 126 and 129 and note the Etruscan gentilitial ending -ie), hil (cf. the Etruscan inscription CIE 3: hil puratum) and for the big kicker, a word probably declined in the genitive plural, klanturus (cf. Etruscan words clan "son" and clante, presumably "adoptive son").
Considering all of this (which is just the tip off the iceberg, mind you), the meme that Rhaetic is somehow unrelatable to Etruscan is positively proposterous at this point, born on blissful ignorance rather than informed opinion. To the contrary, these inscriptions are close kin to Etruscan. Spread the joyous news.
 The exact same pattern is found with names in Etruscan inscriptions, such as in TLE 23: Mi mulu Larisale Velχasnasi = "I (am) blessed for Laris Velchasna."