Scientific studies are often speckled with words like 鈥渃an,鈥 鈥渃ould,鈥 鈥渕ay,鈥 鈥渁ppear,鈥 鈥渓inked鈥 or 鈥渃orrelated.鈥 This is bothersome. These terms are just too 鈥渋ffy鈥 to allow for any solid...