‘No doubt’ equals ‘certainty’ – and it would seem that doubt/certainty are mutually dependent concepts i.e. each one exists in reference to the other.

Here is a puzzle for you…

‘No doubt’ means 0% (‘zero’) doubt – which we know means ‘certainty’.

But is it possible for 100% (or ‘absolute’) doubt to also mean ‘certainty’?

How can 100% of one ‘thing’ and 0% of one thing both equate to something else?

Is there a loophole on this? Or is this the point at which one concept topples into another?