Mayonnaise is oil, egg yolks, and an acid (typically vinegar or lemon juice). If you don't have these things, it's not mayonnaise.<p>It seems like it'd be pretty easy for them to call it "Vegan Mayo," where folks are assuming there's a major substitute for a core ingredient. "Just Mayo," on the other hand, seems to claim the opposite.<p>It's still pretty whiny for Hellmann's/Best Foods/Unilever/Whomever to file the lawsuit, but that doesn't mean they're wrong.