1. Reliance on the Copernican Principle
1.1. if an item is drawn at random from one of several sets or categories, it's likelier to come from the most numerous category than from any one of the less numerous categories
2. The Universe too large not to have intelligent life
2.1. Infinity Paradox
2.1.1. Compare the total number planets in the universe to infinity
2.1.1.1. *I know the universe does not have an infinite amount of planets, however for this sake we are substituting its very large amount of matter into an infinity paradox
2.1.2. (Total Planets in Universe) x P(#of habitable planets)
2.1.3. =infinity
2.1.4. infinitely many habitable planets
2.1.5. repeat function
2.1.6. infinitely many planets hosting life
2.1.7. repeat function
2.1.8. infinitely many planets hosting intelligent life
2.2. Comparative Version
2.2.1. Milky Way >10^9 habitable planets
2.2.1.1. Many many galaxies
2.2.2. very unlikely that none of them had developed intelligent life
3. Components of life too abundant
3.1. 95% of composition of almost every life on Earth (a form of chemical life)
3.1.1. Hydrogen
3.1.2. Oxygen
3.1.3. Carbon
3.2. ranks among top 5 most abundant elements in the universe
3.2.1. Hydrogen
3.2.2. Oxygen
3.2.3. Carbon
3.3. so life would've probably developed across many planets, many environments
3.4. life would have a certain probability to develop into intelligent life at some point on different planets
4. AT: Fermi Paradox
4.1. Keeping yourself hidden
4.1.1. Dark Forest Paradigm
4.1.1.1. Survival is the most important aspect of any civilization
4.1.1.2. Chain of suspicion when survival is at stake
4.1.1.3. Technological booms can quickly alter power positions of civs
4.1.1.4. Therefore, civs must destroy each other upon mutual/single sided discovery since survival is at stake
4.1.1.5. Therefore, best alternative: keeping yourself hidden
4.1.2. Predator civilizations
4.1.3. Tendency towards Xenophobia
4.1.3.1. Xenophobia prevalent in human culture
4.1.3.1.1. Fear of outsiders/newcomers common, survival instinct
4.1.3.2. Therefore, xenophobia might exist in other cultures
4.2. Great Filter
4.2.1. Scenario 1: Behind us
4.2.1.1. On our way to becoming Type III civ
4.2.1.2. AT: Behind us; We are currently facing some very big problems, problems that (many people believe) can't be solved due to human nature
4.2.2. Scenario 2: We're First
4.2.2.1. Explains missing communications and missing contact from aliens
4.2.2.2. AT: Human life evolved rather late in the spectrum of time in the universe
4.2.3. Scenario 3: In front of us