They simply love to watch him play and are happy he acknowledges their existence in his world.
He did not, of course, thank the man or even acknowledge his existence.
Let somebody close, and you have to acknowledge their existence.
It was the first time her father had acknowledged his existence.
It clearly took an effort to acknowledge the existence of a man.
A black program was one so secret the government did not acknowledge its existence.
It would be nice if we could acknowledge his existence in the budget, too.
"Baby" is about nothing less than being forced to acknowledge its existence.
But that done, let no one speak or even acknowledge the existence of the other at this point.
There is hardly any pressure within them even to acknowledge their own existence.