Originally Posted by JustDressageIt
Unfortunately this is not true; a shank bit can have almost any type of mouthpiece but it isn't a snaffle. When you pull on the rein of a snaffle bit, the horse's mouth feels exactly that pressure; a curb bit at least doubles the pressure.
Yes, but I was speaking in general terms- and sometimes in western riding, any bit with a jointed mouthpiece is referred to as a snaffle, regardless of whether or not it has shanks. An example of this would be an argentine snaffle. Whether these bits are "true" snaffles is generally a discipline-specific argument, but regardless, they are also referred to as snaffles.