statistically, more people survive when they think only of themselves...

Some things need to be recorded. I imagine proud parents feel the same. But my cat knows how to operate the front door knocker. Oh yes. She has a perfectly serviceable cat flap at back, but no. There's a banging noise at the front, I go to investigate, and there she is, looking ginger and innocent.
But well done, Puskas. More intelligent than many humans I could mention. Richard Littlejohn, or Melanie Phillips, for example...