Opinion is not a fact!

How to eliminate most rookie mistakes and errors from your business plan (if you have one at all).
You can start a sentence with “I think” or “I firmly believe,” as long as that sentence doesn't turn out to be the only source of truth about your customers, tools or business plans. You can trust your intuition, as long as you are smart enough to put it to the test using the rigorous scientific method used in business. You can certainly have opinions - even the strongest ones - as long as you separate them from facts and examine the very nature of your beliefs. What I want to show you is that even though we live in a time when it seems that facts, truth and reality don't matter, it's better to run your business like a scientific laboratory, not a tarot reading.