Did I miss this year’s World Cup? How can something be predictive for an event that hasn’t happened?
Weather forecasts predict weather that hasn't happened yet. What is the point in predicting something that has happened?
I can say it’s going to rain 10 days from now based on whether it’s cloudy today. I wouldn’t say it’s a good prediction until it rains 10 days from now.
In other words: how effective has this salary prediction worked out in the past?