He proposed the concept of a single punctuation mark in an article in the magazine TYPEtalks .
As the head of an advertising agency , Speckter believed that advertisements would look better if copywriters conveyed surprised rhetorical questions using a single mark .
Speckter proposed the concept of a single punctuation mark in an article in the magazine TYPEtalks .
As the head of an advertising agency , Speckter believed that advertisements would look better if copywriters conveyed surprised rhetorical questions using a single mark .