Introduction to Logic Tools
for
Thought
Suarez

Suarez is a (slowly) recovering liar. He lies on six days of the week, but on the seventh day he always tells the truth. One week, he made the following statements on three successive days.

Day 1: "I lie on Mondays and Tuesdays."
Day 2: "Today, it's Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesdays and Fridays."

On which day does Suarez tell the truth?