i kind of like the word delpa, as the mathematical expression, the most change. are there words that have entered the lexicon or you've used in your books that you think are particularly good? >> it's always open to interpretation. value is in the eye of the beholder. i do think disrupt is an important word. it's a buzzword and i think it's important because it's not an intention to set out to disrupt. it's something that happens because of true innovation. in that case, that's what silicon valley can be really good at, actually disrupting markets. to me it's aspirational and inspirational. any time i use disrupt in silicon valley. >> you get an eye roll. >> i get an eye roll. >> people are disruptive. you look at -- what's the hotel? >> hotel tonight? >> air b&b, absolutely disrupting the rental market as well. >> and in legal trouble for that. people don't like that they're disrupting right now. it's a huge problem. >> renters are losing their places because they're violating their agreements. >> the air b&b and disrupting what we've always had. people are sayi