Well, kinda. The novice says "everything is a string." The adept says "tcl values are implemented as dual-ported objects, meaning that the internal representa

Well, kinda. The novice says "everything is a string." The adept says "tcl values are implemented as dual-ported objects, meaning that the internal representation of every value is automatically and transparently converted to the type that is needed at that time." The wizard says "everything is a string." Everything can be a string. From the outside, everything looks like a string. And it's considered bad style to violate this principle. But if you're talking implementation, everything isn't exactly a string.