He wanted to estimate N, the number of communicative civilizations out there in our galaxy, and he included in there the rate of star formation, the rate of planets, but crucially, intelligence.
Chtěl odhadnout N, počet komunikativních civilizací v naší galaxii. A zahrnul tam rychlost tvorby hvězd, podíl planet, ale co je klíčové, inteligence.