Intel is making great products again, and the potential of the foundry business is underappreciated. One of the most difficult aspects of investing is differentiating between patience and stubbornness. Sometimes, you're wrong, but other times, you just look wrong. Recognizing the difference between the two and not panicking when everyone else seems to disagree with you can be the difference between great results and disaster. Semiconductor giant Intel (INTC -3.28%) is going through a painful turnaround. The ...