1. Conditional Statements!
The If-Thens
and all their versions

2. Conditional statements originally come in the form
If Hypothesis Then Conclusion
There are 3 other forms of Conditional Statements:
Converse, Inverse, and Contrapositive
Converse: Switch Hypothesis and Conclusion
If Hypothesis Then Conclusion
Inverse: We insert NOT to both Hypothesis and Conclusion
If NOT Hypothesis Then NOT Conclusion
Contrapositive: Switch Hypothesis and Conclusion AND insert NOT.
If NOT Hypothesis Then NOT Conclusion