  As new scientists and engineers join the SKA project and as the pressures
come on to maintain costs within a chosen envelope it is worth restating and
updating the rationale for the 'Exploration of the Unknown' (EoU). Maintaining
an EoU philosophy will prove a vital ingredient for realizing the SKA's
discovery potential. Since people make the discoveries enabled by technology a
further axis in capability parameter space, the'human bandwidth' is emphasised.
Using the morphological approach pioneered by Zwicky, a currently unexploited
region of observational parameter space can be identified viz: time variable
spectral patterns on all spectral and angular scales, one interesting example
would be 'spectral transients'. We should be prepared to build up to 10 percent
less collecting area for a given overall budget in order to enhance the ways in
which SKA1 can be flexibly utilized.
