logical necessity, n.All

Logical necessity (n.) claimed ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠for 'he must have seen something in common' adds nothing to what we know; it only suggests another form of words.