system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do we assume extra terrestrial life needs carbon and /or water to live?

why can't it be silicon based? they have similar properties to carbon, as in 4 bonds,etc... is it earth centric to assume other life forms need water and or carbon?
gpt
Ok, you have been tasked with searching planets for life.

Oh boy, where do you even start? You barely even have any telescopes.

You live on Earth. All life on Earth is carbon-based and relies on water. This is an absolute fact and you know it to be true, because you're one of those squishy life-forms.

You did the math, and *maybe possibly* life *could* also be based on silicon and eat hydrofluoric acid.

What planets do you search first?