1. I suppose self-delusion is a gift of natural selection as well.

2. To talk of planning and decision making is, to these people, to indulge in self-delusion.

3. That it failed to do so-refused to do so-is testimony to the human capacity for evasion and self-delusion.

4. As the initial state of strains and stresses that exists within an untouched rock mass is principally unrecognisable and as the properties of the rock are ambiguous three-dimensional and time dependend, any analytical calculation of strains, stresses and means of support leads invariably to a self-delusion.