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-rw-r--r--src/lexer.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/lexer.h b/src/lexer.h
index e5d64dc..8e3ccb1 100644
--- a/src/lexer.h
+++ b/src/lexer.h
@@ -10,6 +10,7 @@ typedef enum TokenType {
CLOSE_PAREN,
START_COMMENT,
JUSTIFICATION,
+ CONTRADICTION,
PREMISE,
ASSUMPTION,
NEGATION,