What do we know? Just posing the question is suggestive of something remarkable – of looking to the unknown behind the known with an implicit wisdom that transcends the explicit knowing, with a doubt that makes a mockery of not doubting.

But the moment we stop doubting we stagnate – for ignorance is born of what we think we know, and no certainty is as certain as the desire for the truth to be ours.

And science has found that we can carry on indefinitely, gathering mountains of evidence in support of our pet theories, and still be wrong.

© Mike Laidler 2015