While I am not an attorney - I have been delaing with the NDA situation for a number of years.
I agree that the execution of one is an indication of intent. However, what is important to remember is that having an NDA -doesn`t automatically mean you are protecting your valuable intellectual property and it doesn`t cover "everything" you say and do.
Generally, to be effective, the disclosing party must (clearly) identify the "secrets" that are covered.
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