Acquitting the officials, it said that there was 'no causal connection between the company's management and the tragedy'.

It's a self-selection process: there's no causal connection.

Is there a causal connection between the writing down and the weight loss?

But it insists that there is no proven causal connection between the illnesses and attendance at the tests.

Such a striking correlation cannot possibly have occurred by accident, and a causal connection is undoubtedly present.