The number of civilian casualties in Gaza has been at the center of international attention since the start of the war. The main source for the data has been the Hamas-controlled Gaza Health Ministry, which now claims more than 30,000 dead, the majority of which it says are children and women. Recently, the Biden administration lent legitimacy to Hamas’ figure. When asked at a House Armed Services Committee hearing last week how many Palestinian women and children have been killed since Oct. 7, Secretary of Defense Lloyd Austin said the number was “over 25,000.” The Pentagon quickly clarified that the...