We've already been there. The text states that IF THERE IS A VARIATION IN THE CLASS OF SERVICE ON THE OTHER CARRIER then, and only then, there may be a variation in the EQM. Not applicable to my case. I flew in the class booked. Are you denying that the receipt says it's a Lufthansa flight, class L, and that I am to receive 100% EQM?

The only alternate reading of that disclaimer is, "the EQM figure posted here for any non-CO operated flight is absolutely worthless. You should ignore it, as the actual EQM is computed by a formula you can find elsewhere."

The problem with that reading is not so much that it is far-fetched but that it forces one to ask what the purpose is of posting an absolutely worthless number. If CO can't guarantee that its number is correct (barring a class change) then it could easily replace it with a link to its LH table, saying "To compute the EQM you will receive, click here"

But that's not what it did. It said, for this particular flight, on this particular airline, on this particular date, in this particular class of service, you will receive 100% EQM. If you would like to buy under those terms, click here.

And when I *did* click, and when CO took my money, that established the contract which CO is now in breach of.