Table 1.

Prisoners’ dilemma

	Don’t confess	Confess
Don’t confess	−2 to –2	−20 to 0
Confess	0 to –20	−10 to –10

Prisoner 1 (named ‘Row’)=rows; Prisoner 2 (named ‘Column’)=columns.

# before comma=Row’s sentence; # after comma=Column’s sentence.