I was reading the official manual:
http://cdn.akamai.steamstatic.com/steam/apps/291650/manuals/pe-game-manual.pdf?t=1427368103
Page 4 literally says the opposite of page 15. But, anyway, neither is true because the final game behaves differently. The Errata page is also wrong: http://eternity.obsidian.net/game/manual-errata
WHO CARES ABOUT THE MANUAL, NO ONE EVER READS THEM. Right?