There is no need to remember anything actually. If you've ever used Enso, Ubiquity (both made by Jef's son Aza) or Sublime Text 2, or Google Instant/autocomplet

There is no need to remember anything actually. If you've ever used Enso, Ubiquity (both made by Jef's son Aza) or Sublime Text 2, or Google Instant/autocomplete, or indeed Firefox's "Awesome Bar", then that is the kind of experience the humane interface describes.