Biosignature- signs that life was present

Abiotic exponation- any explanation that doesn’t require life

Exoplanet- planet outside the solar system

Telescopes pick up light from these planets, we then analyse the light to see what elements/compounds make up their atmosphere. Say there’s a planet which has a noticeable increase in atmospheric carbon, the scientist in the meme is tempted to say it’s evidence of life (Forrest fire, industrialization, respiration), but it could be a geological process (volcanic eruption)