What do programmers know?

This list is not a translation of any specific article, but a series of statements to the question "What do programmers know, what do non-programmers know?"

• Open source does not mean that anyone can edit this code
• There are dozens of actively used programming languages. There are hundreds of programming languages ​​that no one uses.
• Creating any website or application is hard work.
• What programmers learn at universities rarely overlaps with their workflow after graduation
• The fact that I am a programmer does not mean at all that I know why Word does not start.

Under the cut a little more. And, of course, welcome to the comments.
')

• Programming is not a knock on the keys, but the alignment of logical chains. This can be done by going to bed, walking in the park, looking out the window, in general, doing anything
• Far from all programmers wear glasses and / or deerskin sweaters and Star Wars fans.
• I have no idea how to hack the Pentagon!
• You can count up to a thousand on four fingers.
• a = a + 1 is normal
• Creating a site and creating an application are different things.
• A cool program for a lot of money will not solve organizational problems in your enterprise.
• Programming is not math
• Under the hood of your everyday programs, operating systems and websites, such a quiet horror is going on, as if you disassembled a brand new Boeing and saw that the fuel tank was supported by wardrobe hangers and the chassis was wrapped with tape

What else do programmers know?