> it necessarily shifts probability density into our future why? if the filter is "move from unicellular to multicellular" it would have wiped out life on Mars

> it necessarily shifts probability density into our future why? if the filter is "move from unicellular to multicellular" it would have wiped out life on Mars but Earth somehow made it. It shows there's at least one step behind us which is "hard" (while showing there's another one which is "easy").