Wrong question.
The question is: does anything we perceive really exist in the manner in which we perceive it.
And the answer is No.
Every level of material existence is a gateway to a subordinate level; simpler, but more and more mysterious.
All attempts to define anything in concrete terms are defeated by the seemingly infinite regress into which physical reality lures the one that seeks to understand.
Thus, even the baker girls are not objectively real.
Sadly.