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diff --git a/ch02/2_a_1.txt b/ch02/2_a_1.txt
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+-- What are the types of the following expressions? 4 comments
+--   - False
+--   - (["foo", "bar"], 'a')
+--   - [(True, []), (False, [['a']])]
+
+-- Let's use ghci to check our answers
+
+ghci> :t False
+False :: Bool
+
+ghci> :t (["foo", "bar"], 'a')
+(["foo", "bar"], 'a') :: ([String], Char)
+
+ghci> :t [(True, []), (False, [['a']])]
+[(True, []), (False, [['a']])] :: [(Bool, [[Char]])]