The case of leaded versus unleaded gasoline is one where all three conditions apply.
In these models the role of the sensory system is very important, because every behavior establishes a relation between perception and action leaded by its own intention.
Therefore, this construction leaded to a notion of 'quantum groupoid', and a construction of a duality within 'quantum groupoids'.
That is a big difference from the debate about leaded and unleaded petrol that we had a few years ago.
We all know now that unleaded petrol causes more damaging emissions into the atmosphere than leaded.
The pricing differential between leaded and unleaded petrol has been fairly successful.
Who invented the differential between leaded and unleaded petrol?
There is no evidence to suggest that the severity of these fires is dependent on whether the fuel is leaded or unleaded.
