Mr Cameron suggests rethinking the whole issue, starting from the principle that users may be identified only with their explicit consent.
Starting from the principle that every driver and cyclist should obey the law and treat each other with respect, we suggest no driver should in future receive a licence without demonstrating a level of respect for more vulnerable road users, including pedestrians.
Starting from the principle of virtual works, we construct a mathematical model of the equilibrium state of our system subjected to stresses of general form.
It starts from the principles of energy harvesting devices and then describes the requirements on the used materials at both structure and morphology.
Applicants were vetted for Nordic qualities in Himmler's words, "like a nursery gardener trying to reproduce a good old strain which has been adulterated and debased; we started from the principles of plant selection and then proceeded quite unashamedly to weed out the men whom we did not think we could use for the build-up of the SS".
In order to be off-grid, they will start from the principle of using as little energy as possible.
"We are just at the beginning of the second phase of the search, and we do not start from the principle that this phase will not be successful," she said.
Among the few other Greek writers who subsequently mentioned Xenophanes are Plato, who said that "The Eleatic school, beginning with Xenophanes and even earlier, starts from the principle of the unity of all things," and Theophrastus, who summed up Xenophanes' teaching in the formula "The all is one and the one is God".
Functional analysis starts from the principle, explained in the section Complex analysis, that, in order to define basic analytic notions such as limits or the derivative, it is sufficient to be able to carry out certain algebraic operations and to have a suitable notion of size.
