It is not possible without using some sophisticated features of event
listening and macros. But one should ask the question: what would be the
benefits? You can refer the second cell from the first one -- something like
A2: =A1, so A1 and A2 will both have the same value and each time you change
A1, A2 will change.

pls help wrote:
How can 2 cells have the same values, such that when I edit either cell the
change is reflected on both?