Original sentence: Critics state that it is not likely that Ung's family would be vacationing at that time in that region of Cambodia, that the picture was taken at Wat Phnom , which is in Phnom Penh, the capital of Cambodia, and that Ung's memory is therefore unreliable
Edited sentence: Critics state that it is not likely that Ung's family would be vacationing at that time in that region of Cambodia and the picture was taken at Wat Phnom , which is in Phnom Penh, the capital of Cambodia, proving that Ung's memory is unreliable