example -- I'm waiting for my morning bus and it
| doesn't arrive:  surprise.  I then think -- in the past
| sometimes my bus hasn't arrived when it's a public holiday
| I've forgotten about:  this case should be the same (induction),
| I then form the hypothesis that it is a public holiday (abduction).

I left off last time at the point where you were just beginning to
contemplate the possibility that your current situation might fall
under the case description of a public holiday, thereby explaining
the a