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ITA. There's a lovely phrase that keeps coming up in Bill Bryson's A Short History of Nearly Everything (apols if title not quite correct). It's "what we think we know". It refers to our knowledge at this point in time. We used to know the earth was flat. It's arrogant to think we know everything about everything and I think that includes life on other planets. I'd be surprised if there was nothing out there. I'd be equally surprised if there was ever a revelation of alien life here though.
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"Alice came to a fork in the road.
'Which road do I take?' she asked.
'Where do you want to go?' responded the Cheshire cat.
'I don't know,' Alice answered.
'Then' said the cat, 'it doesn't matter.'" - Lewis Carroll
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