Dreaming right

Watching an entertaining a program on TV a talk between
an Astro-physicist and a biologist, the astral-man was loud
given to interrupting the biologist, who was mild-mannered
English gentleman, I had read one of his books.
“how do we know we are not dreaming? Said biologist
Perhaps wishing he was.
I went for a walk when coming back home, I wondered
If I had been dreaming the walk, as I’m not fond of rambling.
To be sure, I took another walk.
Coming home, I was tired, but sure I had not been dreaming
or had I? but I was not going for a third stride.
I switched on the TV to watch the “outdoor man.”