The theory, while correct in as far as it goes, is not sufficiently rigorous or precise to allow one to do engineering.

In the words of the Ministry: 'This is not a sufficiently rigorous restoration, nor does it respect the monument'.

Investigators said, though, that the NASA study was not sufficiently rigorous.

It was sufficiently rigorous in that regard to be a valid result.

Since large computations are hard to verify, such proofs may not be sufficiently rigorous.

The solution is a sufficiently rigorous exam but no educational stakeholder wants that because it would expose them to the truth.

'It encouraged work that was not sufficiently rigorous.'

Nor are they likely to be sufficiently rigorous.

We must demand compliance with the laws we adopt, but also revise those which are not sufficiently rigorous.

These descriptions of the real numbers are not sufficiently rigorous by the modern standards of pure mathematics.