Reply to Carlson (2020) comment on "Deglaciation of the Greenland and Laurentide ice sheets interrupted by glacier advance during abrupt coolings". (15th July 2020) - Young, Nicolás E.; Briner, Jason P.; Schaefer, Joerg M.; Miller, Gifford H.; Lesnek, Alia J.; Crump, Sarah E.; Thomas, Elizabeth K.; Pendleton, Simon L.; Cuzzone, Joshua; Lamp, Jennifer; Zimmerman, Susan; Caffee, Marc