Phi Sigma Sigma had a chapter at Indiana University of Pennsylvania (Gamma Alpha) that was installed in 1969. Do you suppose that whoever created it was reviewing each organization's chapters and incorrectly thought it was I U, especially as the dates match?
Wouldn't be that surprised if Baird's in either 1976 or 1991 fouled it up causing this.
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Because "undergrads, please abandon your national policies and make something up" will end well --KnightShadow