Also “aliens exist” is highly plausible.
“Aliens visit earth in a wide variety of badly hidden spacecraft in a pattern like they are trolling us” is somewhat less plausible.
Other things we might see with aliens.
Non-existance. Earth disassembled to make dyson sphere back when there were dinosaurs.
Radio messages.
Aliens landing on white house lawn. Making their existence very clear and asking for trade deals.
Exhaust plumes around pluto. Breaking from near light speed takes A LOT of thrust.
Aliens kill everyone with grey goo nanotech.
Aliens upload everyone and send mind copies to their homeworld to run psycology experiments on.
Nothing. Aliens have got flawless stealth, no one sees a glimpse.
A single design of craft with uniform size, shape and performance that is making no attempt to hide.
The chance of flying saucers as we observe them given only aliens reaching earth seems quite small.
Also “aliens exist” is highly plausible.
“Aliens visit earth in a wide variety of badly hidden spacecraft in a pattern like they are trolling us” is somewhat less plausible.
Other things we might see with aliens.
Non-existance. Earth disassembled to make dyson sphere back when there were dinosaurs.
Radio messages.
Aliens landing on white house lawn. Making their existence very clear and asking for trade deals.
Exhaust plumes around pluto. Breaking from near light speed takes A LOT of thrust.
Aliens kill everyone with grey goo nanotech.
Aliens upload everyone and send mind copies to their homeworld to run psycology experiments on.
Nothing. Aliens have got flawless stealth, no one sees a glimpse.
A single design of craft with uniform size, shape and performance that is making no attempt to hide.
The chance of flying saucers as we observe them given only aliens reaching earth seems quite small.