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23 propositions
11 inferences
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Claim
99.8% of species that have ever existed went extinct
Arguments
If it is true that...
Galaxies are born and dying all the time
Then it must be true that...
99.8% of species that have ever existed went extinct
If it is true that...
The sun will collapse and consume the earth in a heat death
Then it must be true that...
99.8% of species that have ever existed went extinct