Coelacanth, on 2015-February-03, 11:14, said:
Now, if E bids 2♠ there is no way EW will find NT. E has failed to bid NT twice now and W will never bid NT with two small clubs. A 2♠ call by E will result in a final contract of 2♠ (making some number of tricks less than 9) or 3♦ (making the same 10 tricks they made in 2♦).
You mustn't forget that North and South are still at the table when you are assigning scores. Presumably North passed over West's 2
♦ bid because he had no descriptive bid to make, but he was expecting to hear more on that round from South. If East were to bid 2
♠ and South pass, North surely is not allowed to pass this out in any system with inverted minor agreements.
If you're dreaming up a sequence that gets EW into 3NT you also need to consider the likelihood that North is going to double, expecting a much stronger hand from South.