In fact, these said documents were not dated as such but were assigned this date by local school teachers who had prepared chronicles for their towns to submit to the National Library in 1911. Aside from this, Soncuya's calculations are generally quite unreliable. For example, by his estimation, the year 1212 is 16 generations after the year 1160. Obviously, 16 human generations could not fit into a span of only 52 years.
Sa katotohanan, ang dalawáng kasulatang itó ay waláng tagláy na petsa ngunit kinailangang lagyán ng petsa ng mga gurong pampáaralán na sumulat ng mga kasaysayan ng kaní-kaniláng bayan para sa National Library noóng 1911. Bukód dito, hindî maáasahan ang pagkakalkulá ni Soncuya. Halimbawà, sa kaniyáng tantiyá, ang taóng 1212 ay 16 na salinlahì mulâ sa taóng 1160. Madalíng makitang hindî máaaring magíng ganoón karami ang salinlahì ng tao sa loób ng 52 taón lamang.