01
B₄ Nucleotide Lattice
Belnap FOUR as the genetic nucleotide alphabet — the 4-valued distributive lattice underlying the genetic code. G (Both) at top, A (False) at bottom, C (True) and U (Neither) at intermediate positions.
B₄
Lattice
Nucleotide
Watson-Crick complement (A↔U, G↔C) ≠ Belnap negation (¬B=B, ¬N=N). Both lattice structures are simultaneously present.