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