Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
So in this case ~たら has no nuance of supposition?a)
寝てると can be used, but 寝てたら is more colloquial.
Sorry, I can't grasp this. Do you mean:b)
because (it's common to consider that it was just a dream. I'm not wrong, right?)