Cohesion and the least effort principle

The difficulty is that this can result in a reduction of feasibility by getting readers to process informaton they do not need.

The general point here is that communication generally operates on a least effort principle and we only use as much language as we need to make the required contextual connection. 

The problem is always to know how to regulate the degree of co-textual explicitness by the judicial choice of pro-form.

Example

The Independent

Illustration