Problem: Does "A more stringent study conducted in 1999 by Harvard University estimated the natural human rhythm to be closer to 24 hours, 11 minutes: much closer to the solar day but still not perfectly in sync." answer the question "What was the fault not considered in the early theories of day length?"

A: no

Problem: Does "One of Nasser's main domestic efforts was to establish social justice, which he deemed a prerequisite to liberal democracy." answer the question "What did Nasser work to put into place in Egypt?"

A: yes

Problem: Does "Following a series of PLO attacks in 1982, Israel invaded Lebanon that year to destroy the bases from which the PLO launched attacks and missiles into northern Israel." answer the question "When did the Israeli air force destroy Iraq's sole nuclear reactor?"

A:
no