Thanks Jack, really interesting and useful insight! And no misunderstanding about OneClick statements either 
Question: Do the various OneClick tools, which limit the data available for different LCA purposes (e.g. for LEED-compliant LCA, or BREEAM) not solve the problem of mixed data? LCI and EPD mixing, that is.
I genuinely don’t know for sure. Now I think about it, and based on your message, I’m thinking about the datapoints in other parts of the OneClick input process, outside the Building Materials tab – on construction operations, and other tabs. I’m thinking a lot of those might be LCI datapoints. However, they’re a relatively small portion of a typical building assessment.
I appreciate there are tools available in OneClick with fewer restrictions on database usage too.
I appreciate your time and thoughts, thanks very much Jack.