An important class of implicit functions comprises those defined by equations of the form x-f(y)=0. Choosing y as the value means that the implicit function is the inverse of f. This type of implicit function is of particular interest when that inverse is not expressible as a closed-form expression, and thus is difficult to study directly.

That Humphries should imply that, in the Foster's ads, Hogan's ocker appropriated McKenzie's discourse (specifically the idiom crack an ice-cold tube) reinforces my contention.

You want to know what it's like to be an alkie, don't you, boy?

Where's my wife and family? / What if I die here? / Who'll be my role model / Now that my role model is gone, gone?