Peter Cundill on skepticism

From There's Always Something to Do:

Scepticism is good, but be a sceptic, not an iconoclast. Have rigour and flexibility, which might be considered an oxymoron but is exactly what I meant when I quoted Peter Robertson’s dictum ‘always change a winning game.’ An investment framework ought to include a liberal dose of scepticism both in terms of markets and of company accounts. Taking this a step further, a lot of MBA programs, particularly these days, teach you about market efficiency and accounting rules, but this is not a perfect world and there will always be anomalies and there is always “wriggle room” within company accounts so you have to stick to your guns and forget the hype.