A theory which is not refutable by any conceivable event is non-scientific.

We do not know: we can only guess.

All life is problem solving.

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race ... those who dissent from the opinion, still more than those who hold it.

-- John Stuart Mill

Democracy has to be born anew every generation, and education is its midwife.

-- John Dewey

The public sphere is a social phenomenon just as elementary as action, the actor, the group, or the collective; but it eludes the conventional sociological concepts.

-- Jürgen Habermas