premise: Texas Monthly v. Bullock 489 U.S. 1 (1989) was a case brought before the US Supreme Court in November 1988. The case (initiated by the publishers of "Texas Monthly", a well-known general-interest magazine in Texas) was to test the legality of a Texas statute that exempted religious publications from paying state sales tax.
hypothesis: The legality of religious publications paying state sales tax was assessed in a Supreme Court case before 1988.
reason: The case Texas Monthly v. Bullock was taken to the supreme court in 1988, so it could've have been assessed before the year 1988. I was trying to exploit the wording 'brought before... 1988' to try and get the system to incorrectly determine information about the date.