re: Limits of deductive reasoning.
The superhighway.....
Well, only humans with cars can take it and aim somewhere.
(Just like our knowledge of the universe is owed to the lens of the telescope and rocket technology).
If we want to find more ahead of the highway, we'll need a more powerful car, we'll need technology to find our way (GPS, PC,etc...).
Exploring the universe will depend on our available technology but also, perhaps, technology that will reshape us in an unrecognizable form, perhaps something we, today, wouldn't recognize as human, but our descendants will take it for granted.
Raoul