Why are libs suing taco bell? Did they really expect their beef to be 100% beef?

a href="http://news.yahoo.com/s/yblog_thelookout/20110125/ts_yblog_thelookout/attorneys-question-whether-what-taco-bell-calls-beef-is-actually-beef"http://news.yahoo.com/s/yblog_thelookout…/a