Rocky,
My comment and your answer address two different "valuations".
If future growth rates and future discount rates change; and/or you want a greater return (that bogey could easily replace the discount rate) then the PE is still calculable (provided the GR<DR, or the GR is for a limited period) - but the PE you would pay to achieve your hurdle rate is much lower.
I just did not understand your statement. Now I do.
ij
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes