INWR does not conduct to or from other metals, but it does conduct to and from semiconductors. In fact, semiconductors are the only way to get a SPRK signal into or out of the INWR. So in the description in the game where it says "Insulated Wire. Doesn't conduct to metal or semiconductors", it is incorrect. The description appears when you hover your cursor over the INWR icon in the Electronics element palette.
Yeah, PTCT and NTCT are also incorrect. If someone gives me more correct descriptions I guess I can change them. Or I might just do it myself later when I have time to keep working on tpt. (probably soon)