یک تحقیق علمی هاروارد منتشر کرده همین اخیرا٬ که می‌گه به طور میانگین ذهن ما ۴۷ درصد از مواقع غرق در افکار هست 
There was a research paper that came out of Harvard, just recently, that said on average, our minds are lost in thought almost 47 percent of the time. 