The Moment You Forecast, You Know You're Going To Be Wrong, You Just Don't Know When And In Which Direction.

The Moment You Forecast, You Know You're Going To Be Wrong, You Just Don't Know When And In Which Direction.

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The moment you forecast, you know you're going to be wrong, you just
don't know when and in which direction.
-- Edgar R. Fiedler

Related:

If you gave to forecast, forecast often. -- Edgar R. Fiedle
When you know absolutely nothing about the topic, make your forecast by asking a carefully selected probability sample of 300 others who don't know the answer either.
-- Edgar R. Fiedle...
Everything you know is wrong!
Painting is easy when you don't know how, but very difficult when you do. -- Edgar Dega