Speaker
            
    Cliff Burgess
        
    Description
This talk briefly reviews effective field theory as applied 
to gravity and
time-dependent systems, with a view to seeing how it 
constrains thinking
about cosmological models. I argue that it limits the 
scope of reasonable
models, and provides useful prejudices when thinking 
about popular ideas
like UV Lorentz violation, inflation, dark matter and dark 
energy.