One example from the article pp linked:
‘On the day Balfour forgot Bryce in the car, she had been up much of the night, first babysitting for a friend who had to take her dog to an emergency vet clinic, then caring for Bryce, who was cranky with a cold. Because the baby was also tired, he uncharacteristically dozed in the car, so he made no noise. Because Balfour was planning to bring Bryce’s usual car seat to the fire station to be professionally installed, Bryce was positioned in a different car seat that day, not behind the passenger but behind the driver, and was thus not visible in the rear-view mirror. Because the family’s second car was on loan to a relative, Balfour drove her husband to work that day, meaning the diaper bag was in the back, not on the passenger seat, as usual, where she could see it. Because of a phone conversation with a young relative in trouble, and another with her boss about a crisis at work, Balfour spent most of the trip on her cell, stressed, solving other people’s problems. Because the babysitter had a new phone, it didn’t yet contain Balfour’s office phone number, only her cell number, meaning that when the sitter phoned to wonder why Balfour hadn’t dropped Bryce off that morning, it rang unheard in Balfour’s pocketbook.
The holes, all of them, aligned.’