"Niek Otten" wrote...
....
I don't think so. Goal Seek takes its parameters from the Iteration
dialog: the max number of "iterations" and the maximum change,
which can be set to what Harlan called "machine precision".

Iteration dialog? Do you mean the Iteration section of the Calculation
tab in the Options dialog? If so, maximum change can't be set to
machine precision. So it'd seem a safe bet you don't know what machine
precision means.

Not that I want to restart the discussion about how desirable such
a solution is, just to indicate that accuracy should not be an
issue.

OK, so you don't care much about accuracy. Nice to know.