Martha Christiansen owns women's apparel stores bearing her name in New Seabury, Massachusetts; Lake Placid, New York; Palm Beach, Florida; and Palm Springs, California. At a meeting with her four store managers, she discussed styles she thought appropriate for the forthcoming season, advised them as always to use their best judgment in the goods they purchased for each of their respective stores, and cautioned "but no blue jeans." Later, Jane Farley, the manager of the Lake Placid store, purchased a line of high-quality blue denim outfits (designer jeans with jacket and vest options) from Women's Wear, Inc., for the summer season. The outfits did not sell. Martha refused to pay for them, contending that she had told all of her managers "no blue jeans" and that if it came to a lawsuit, she would fly in three man- 14. agers to testify that Jane Farley had absolutely no authority to purchase denim outfits and was, in fact, expressly forbidden to do so. Women's Wear sued Martha, and the three managers testified for her. Is the fact that Martha had explicitly forbidden Farley to purchase the outfits in question sufficient to pro- tect her from liability for the purchases made by