2.1 Strong 3-valued tables (K3) as developed by Kleene (1938, 1952) 59

2.2 Weak 3-valued tables (B3) as developed by Kleene (1938, 1952) 60

2.3 3-valued tables (Ł3) as developed by Łukasiewicz (1970) 65

How to Swim in Sinking Sands

The Sorites Paradox and the Nature and Logic of Vague Language