[claudiawerner]

>and I buy a used sewing machine so I can take sewing jobs in the evening, then I'm a capitalist and you aren't

I don't think that's true. In the traditional schema (for its faults and advantages), a capitalist is someone who both owns capital and employs wage labour. If you hired people to work on your sewing machine and kept their produce, that would likely make you a capitalist. At the end of the day, these examples don't work well to illustrate the notion of capitalism as a social phenomenon, rather than one involving two individuals who buy beer.