The Frame/Content (F/C) theory (MacNeilage, 1998a) attempts to explain the

evolution and acquisition of speech. It says, in brief, that speech was made

possible by our evolving the capacity to program syllabic “Frames” with

consonantal and vocalic “Content” elements, and that the acquisition of that

capacity in infants is the key window into how this happened. This theory owes

much to four perspectives.