The lone "intuitive" interface is the nipple. After that it's all learned.
This is normally attributed to one Bruce Ediger (though at smallest one individual idea it was initially stated by Steve Jobs, a manufacturer of fine computers), and refers to the common (and invariably inaccurate) clarification of device person interfaces as "intuitive". But in 2001, Bruce denied that it was first to him. This made me amazement what the former of the citation was.
My archetypal halt was a dictionary of quotations, but that doesn't have it at all. Perhaps it is certainly relatively recent, then.
I can get rear as far as August 1994, anywhere Scott Francis suggests the nipple as the lone intuitive interface, in reply to "There really is no person interface metaphor that is truly intuitive." The idea is there, but the exact form is not. (And of course, nipples aren't metaphors, at smallest in this context.) To get near to the usually-quoted form of words, the earliest I can find is this one from January 1995, by one Jay Vollmer. He said:
Actually, the lone really intuitive interface is the nipple.
Did Bruce see this article and akin it, or did he see the idea location else? It's not really imaginable to inform from Google's archive. At any rate, he started using variants of it shortly afterwards. For instance, in February 1995:
It's an old saw, I know, but the lone really, really "intuitive" interface is the individual nipple.
Slightly afterward the identical month, we see a type on the "it's all learned" theme from one Taylor Hutt:
I contend that no device interface is intuitive -- none; they are all learned.
In April 1995 Bruce is back:
By this definition, the nipple is the lone "intuitive" user interface.
and afterward afterward that month:
Basically, the lone "intuitive" interface is the nipple. After that, it's all learned.
So perchance Bruce does have the finest assertion to this form following all? Maybe. At any rate, I think I favor his 2001 version:
There is no intuitive interface, not equal the nipple. It's all learned.