An employee was discharged for violating the company's no-solicitation rule in its factory and offices. The employee had persisted in soliciting union membership on company property during lunch periods. The company argued that its no-solicitation rule would have been enforced against not merely union solicitation but any solicitation. How did the court decide?

References: Republic Aviation Corp. vs. NLRB, 324 U.S. 793 (U.S. Sup. Ct.) and Business Law with UCC Applications 14th edition by Paul A. Sukys and Gordon W. Brown, Chapter24 Agency and Employment