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\hspace{-0.09cm}\scalebox{0.85}{ \begin{dplltabular}{6} \dpllStep{1|2|3|4|5|6} \dpllDecL{0|1|2|2|2|2} \dpllAssi{ - |$a$|$a, b$|$a, b, d$|\makecell{$a, b, d, $ \\ $\lnot f$}|\makecell{$a, b, d, $ \\ $\lnot f, e$}} \dpllClause{1}{$\lnot f, \lnot b, \lnot a$}{$\lnot f, \lnot b, \lnot a$|$\lnot f, \lnot b$|$\lnot f$|$\lnot f$|\done|\done} \dpllClause{2}{$\lnot e, a, \lnot d$}{$\lnot e, a, \lnot d$|\done|\done|\done|\done|\done} \dpllClause{3}{$\lnot a, c, b$}{$\lnot a, c, b$|$c, b$|\done|\done|\done|\done} \dpllClause{4}{$f, \lnot a, e$}{$f, \lnot a, e$|$f, e$|$f, e$|$f, e$|$e$|\done} \dpllClause{5}{$d, \lnot a, \lnot b$}{$d, \lnot a, \lnot b$|$d, \lnot b$|$d$|\done|\done|\done} \dpllClause{6}{$\lnot a, \lnot c, b$}{$\lnot a, \lnot c, b$|$\lnot c, b$|\done|\done|\done|\done} \dpllBCP{ - | - |$d$|$\lnot f$|$e$| - } \dpllPL{ - | - | - | - | - | - } \dpllDeci{$a$|$b$| - | - | - |SAT} \end{dplltabular} }
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