Thanks for the responses. Its great to have tools like that but I think its better to understand how the tool works than to just use it. Either way I was right and it is a good tool for checking my own work.

RG thanks for posting that article, it was an interesting read. I am a research scientist in a very different field so that was good clarifying information. After reading physics publications all day I do not really want to read journal publications all night too so that was an excellent synopsis of the current understanding.

All the best and again thank you for the responses.

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