Well, you learn something new some days.
I had never used the Reminders.app – probably because I did not know that it existed
I found it, and made sure that the settings included notifications to be on (thanks, Chris), and then I did the following two things:1. I asked Siri to ”remind me when it was 1:30”. She did so – but that ”reminder” came from the Clock.app. In effect, I had asked Siri (without realizing it) to set an alarm for that time. It certainly was an easy way to accomplish that. I need to remember that.
2. I asked Siri to ”set a reminder for 1:45”. She did so – but only after asking me what I wanted to be reminded of. She's good
I said, ”Nothing in particular". At 1:45, she reminded me of Nothing in particular. 
(Sounds like someone that I used to date.) That reminder came from the Reminders.app.I could get used to this.
