Is Skepticism the Key to Value Investing?

Scepticism is imp for any investor. It's always essential to challenge assumptions, avoid herd mentality and think independently. Skepticism keeps investors safe and helps them avoid things that are too good to be true. John templeton warned about the risk that's created when people say it's different this time. But he also allowed that 20 % of the time they're right. Given the rising impact of technology in the 20 first century, i'd bet that percentage is a lot higher to day.