this led to the physical symbol system hypothesis, that a physical agent that can manipulate symbols is necessary and sufficient for intelligence. as the video comes to an end, she waits for her limousine to arrive at the hotel. the green league left the government on 31 may 2002 in protest of the government's decision to build the country's fifth nuclear power plant. other scientists say that this "tipping point" will reverse itself as new forest life is established. the weather was miserable, and the customary large crowd was not so impressive as in previous years. 