C.E. Evans wrote:
Only three Galaxy-class ships were lost.
Weren't there only six of them in service at that point though?
Officially, we don't know how many Galaxy-class ships were built. The TNG Technical Manual
suggested that there were only going to be twelve such ships (6 built initially, with 6 more to be built later when warranted), but onscreen
the number could have been higher given how many we saw during in action in DS9 (one was even present in VOY's finale).