<keyword>clear</keyword>
<keyword>clearbody</keyword>
<keyword>change</keyword>
- <keyword>compare</keyword>
<keyword>constructor</keyword>
<keyword>contradiction</keyword>
<keyword>cut</keyword>
- <keyword>decide</keyword> <keyword>equality</keyword> <!-- CSC: ??? -->
<keyword>decompose</keyword>
<keyword>discriminate</keyword>
<keyword>elim</keyword>