If there’s PUT, there’s GET.

If there’s ADD, there’s DELETE.

If I put a string in, I get a string out.
(Equals 'Only get a string if one was put in.')

If I can generate a time string, I can parse a time string.

If there’s an INSTALL, there’s an UNINSTALL.

syntax cheatsheet

emphasis strong emphasis both strikethrough keyboard input
code fragment

 code block 

Quote block

is written as:

*emphasis* **strong emphasis** ***both*** <s>strikethrough</s> <kbd>keyboard input</kbd> `code fragment` code block > Quote block