This may seem stupid, buuuuuuuuuuuuuuuuuuut...

[Mr. Gash]

What is the code used to determine if someone is the traitor? As in, what makes if ply:IsTraitor work? Where is the code making IsTraitor an actual working part of a function?

(Just point me in the direction of the file it's in/paste it in a post and I'll be happy :) )

[Bad King Urgrain]

player_ext_shd.lua

AccessorFunc(plymeta, "role", "Role", FORCE_NUMBER)

-- Role access
function plymeta:GetTraitor() return self:GetRole() == ROLE_TRAITOR end
function plymeta:GetDetective() return self:GetRole() == ROLE_DETECTIVE end

plymeta.IsTraitor = plymeta.GetTraitor
plymeta.IsDetective = plymeta.GetDetective

That "AccessorFunc" generates SetRole and GetRole functions. The underlying field is ply.role, which is just a number.