Earth analog or Twin Earth, a theoretical other planet with conditions similar to Earth
Earth | Earth-616 | Google Earth | Twin Peaks | Earth Day | Aphex Twin | Friends of the Earth | From the Earth to the Moon | Cursed Earth | Earth, Wind & Fire | Middle-earth | From the Earth to the Moon (miniseries) | Manfred Mann's Earth Band | The Day the Earth Stood Still | Earth: Final Conflict | Iced Earth | Down to Earth | de Havilland Canada DHC-6 Twin Otter | Rohan (Middle-earth) | Twin Lakes | twin | Journey to the Center of the Earth | Elf (Middle-earth) | Earth Summit | Earth's magnetic field | Earth Liberation Front | Earth Crisis | Twin Ring Motegi | The Day the Earth Stood Still (1951 film) | I Mother Earth |
Paul Boghossian raised an objection to the class of Twin-Earth-style arguments for externalism in the form of an argument that aims to show that externalism is incompatible with privileged self-knowledge.