Sure. Peter Lynch beat the market for 13 years straight with a fund of up to 900 stocks.

Unless you are as diversified as Lynch was, I don't think it requires great knowledge to beat the market. But it does require taking great risks. You have to be willing to go out on a limb and invest heavily in something that's currently unpopular. Nobody beats the market by doing the trendy thing. Unless that means going all in on one single stock that's popular, which may beat the market for a while, but that comes with its own risk.