|  | \(\text{L2b}_{0}.\!\) | \(\downharpoonleft \operatorname{false} \downharpoonright\)
 | \(=\!\) | \((~)\) | \(=\!\) | \((~)\) | 
|  | \(\text{L2b}_{1}.\!\) | \(\downharpoonleft \operatorname{neither}~ s ~\operatorname{nor}~ t \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright)(\downharpoonleft t \downharpoonright)\) | \(=\!\) | \((p)(q)\!\) | 
|  | \(\text{L2b}_{2}.\!\) | \(\downharpoonleft \operatorname{not}~ s ~\operatorname{but}~ t \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright) \downharpoonleft t \downharpoonright\) | \(=\!\) | \((p) q\!\) | 
|  | \(\text{L2b}_{3}.\!\) | \(\downharpoonleft \operatorname{not}~ s \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright)\) | \(=\!\) | \((p)\!\) | 
|  | \(\text{L2b}_{4}.\!\) | \(\downharpoonleft s ~\operatorname{and~not}~ t \downharpoonright\) | \(=\!\) | \(\downharpoonleft s \downharpoonright (\downharpoonleft t \downharpoonright)\) | \(=\!\) | \(p (q)\!\) | 
|  | \(\text{L2b}_{5}.\!\) | \(\downharpoonleft \operatorname{not}~ t \downharpoonright\) | \(=\!\) | \((\downharpoonleft t \downharpoonright)\) | \(=\!\) | \((q)\!\) | 
|  | \(\text{L2b}_{6}.\!\) | \(\downharpoonleft s ~\operatorname{or}~ t, ~\operatorname{not~both} \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright ~,~ \downharpoonleft t \downharpoonright)\) | \(=\!\) | \((p, q)\!\) | 
|  | \(\text{L2b}_{7}.\!\) | \(\downharpoonleft \operatorname{not~both}~ s ~\operatorname{and}~ t \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright ~ \downharpoonleft t \downharpoonright)\) | \(=\!\) | \((p q)\!\) | 
|  | \(\text{L2b}_{8}.\!\) | \(\downharpoonleft s ~\operatorname{and}~ t \downharpoonright\) | \(=\!\) | \(\downharpoonleft s \downharpoonright ~ \downharpoonleft t \downharpoonright\) | \(=\!\) | \(p q\!\) | 
|  | \(\text{L2b}_{9}.\!\) | \(\downharpoonleft s ~\operatorname{is~equivalent~to}~ t \downharpoonright\) | \(=\!\) | \(((\downharpoonleft s \downharpoonright ~,~ \downharpoonleft t \downharpoonright))\) | \(=\!\) | \(((p, q))\!\) | 
|  | \(\text{L2b}_{10}.\!\) | \(\downharpoonleft t \downharpoonright\) | \(=\!\) | \(\downharpoonleft t \downharpoonright\) | \(=\!\) | \(q\!\) | 
|  | \(\text{L2b}_{11}.\!\) | \(\downharpoonleft s ~\operatorname{implies}~ t \downharpoonright\) | \(=\!\) | \((\downharpoonleft s \downharpoonright (\downharpoonleft t \downharpoonright))\) | \(=\!\) | \((p (q))\!\) | 
|  | \(\text{L2b}_{12}.\!\) | \(\downharpoonleft s \downharpoonright\) | \(=\!\) | \(\downharpoonleft s \downharpoonright\) | \(=\!\) | \(p\!\) | 
|  | \(\text{L2b}_{13}.\!\) | \(\downharpoonleft s ~\operatorname{is~implied~by}~ t \downharpoonright\) | \(=\!\) | \(((\downharpoonleft s \downharpoonright) \downharpoonleft t \downharpoonright)\) | \(=\!\) | \(((p) q)\!\) | 
|  | \(\text{L2b}_{14}.\!\) | \(\downharpoonleft s ~\operatorname{or}~ t \downharpoonright\) | \(=\!\) | \(((\downharpoonleft s \downharpoonright)(\downharpoonleft t \downharpoonright))\) | \(=\!\) | \(((p)(q))\!\) | 
|  | \(\text{L2b}_{15}.\!\) | \(\downharpoonleft \operatorname{true} \downharpoonright\) | \(=\!\) | \(((~))\) | \(=\!\) | \(((~))\) |