Arnold talks to Grandpa Phil about his declining academic performance and his lack of enthusiasm for his dream of getting a grade school diploma. When Grandpa Phil seems to give up, Arnold gets to the root of the issue and finds out that Grandpa Phil is scared that he'll fail. Arnold inspires Grandpa to continue pursuing his dream and helps him study to achieve it.
Nathan sets up a company called Dumb Starbucks that uses the Starbucks logo, colors, and other trademarks He states that he can use the Starbucks brand and logo because the word, "dumb," classifies it as a parody He serves customers the same food and drinks and categorizes the restaurant as an art exhibit to avoid food and safety regulations Dumb Starbucks becomes a hit
This clip explains what rules something must abide by in order to obtain trademark protection, and lists the numerous things (sounds, logos, names, etc.) that can be trademarked. Stan also gives an example of how some things, such as flavor, cannot be trademarked, and why that is the case.