Yossarian wrote:
Superman has "Imaginary Stories"?  Alfred writes "What if" stories about Batman.

The first Alfred tale of Batman II & Robin II was in the April 1960 issue of Batman.
The first Imaginary Story was in the August 1960 issue of Lois Lane.

A close race, but Schiff won. I suppose he and Weisinger were discussing the concept was both stories were being developed, though.