The following video is part of our "Motley Fool Conversations" series, in which analyst Rex Moore discusses topics across the investing world.

Investors are always searching for companies with great competitive advantages, but sometimes those moats turn out to be illusions. Today, Rex talks about one way to be sure the moat you've found is built on a solid foundation.

Rex Moore has no positions in the stocks mentioned above. The Motley Fool owns shares of Apple, International Business Machines, Intel, and Whole Foods Market. Motley Fool newsletter services recommend Apple, Intel, McDonald's, and Whole Foods Market. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.