I'm asking specifically about your answers to the questions "what are some songs with only 2 chords" and "with only 1 chord". You listed like a total of 20 songs of various genres, periods and levels of popularity. Did you have to look them up or do you just know all these songs by heart including their chords?
i went browsing through my itunes, to remind me of songs, but i generally know what they sound like without listening. in some cases i went searching to make sure there weren't any other parts. for example, many songs i knew the main sections were 2 chords, but i went searching around the song to make sure it didn't have something at the end that i forgot about, etc. For example, it's like if someone says "name someone who only wears red, white, and yellow." Ronald McDonald may come to mind, but i might just take a glance just to make sure there isn't a bit of blue somewhere that i forgot about. i hope that makes sense