1. Do you believe that making you prove evolution can occur is a "shifting goalpost argument"?
2. Are you aware that even "tremendously advantageous" mutations can be a result of deleterious mutations? Why don't you read up on it:
3. Please respond to our request from a earlier posting:
"Since you obviously understand this so well, please give us the specific details of why the clams are MORE genetically complex ... and you must reference your findings."
You can pontificate and give your opinion all you want but, unless you provide contradictory information (other than your own thoughts), stop with the accusations a make an intelligent case for your theory.