True positives, true negatives, false positives, false negatives

L(P) - the set of sequences matched by the pattern P

Tp - true pos

Tn - true neg

Fp - false pos

Fn - false neg

Tp = L(P) ? S+

Tn = ¬L(P) ? S-

Fp = L(P) ? S-

Fn = ¬L(P) ? S+

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