[log in to unmask] (mailto:[log in to unmask])   writes:

Am I  missing something here? How can you show a cause and effect 
relationship with  something that is undetectable? Particularly if detectable levels 
have not  shown the suggested effect.
 
At the Galveston meeting, Colin Henderson, my long term research partner  
commented on changes in the wording of some of the 'research'  presentations:
 
Pesticide investigators used to talk about acute and chronic effects,
then we began hearing more about sublethal  effects,
But in Galveston, we heard for the first time about subtle  effects, 
and now, undetectable effects?
 
Jerry

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