McGrath-
Flats and Sharps are NOT the same.
The Well Tempered Harpsicord/Clavichord is an example of the "Great Compromise" that came with keyboard instruments....an approximation....with only one note being "true."
A violinist - (and conductor and music theorist) understands the difference. It is a fascinating history involving the great "Three Bees".
Sincerely,
Gargoyle