It is not "semantic gymnastics". There are only three generations of the Aqua Terra. Omega state this in press releases. Journalists have documented it. Nobody needs your "permission" to accept the facts. Subjective community discussions do not overrule the facts. If you are correct in your asserions and the "logic" behind them there must now be six generations of the Aqua Terra. The Shades versions feature completely new bracelets and a fully polished cases, so, just as the polished centre links on the Bumblebee and the post-2014 Aqua Terra range seems to amount, in your view, to a new generation of the watch the Shades must also qualify as a "fifth generation" Aqua Terra using your logic. That would also mean, using your logic, that the latest black dial Aqua Terra which has another new bracelet with a comfort extension and an applied date window surround represents a sixth generation. Of course nobody is declaring the Shades to be Gen 5 and nobody is declaring the Black as Gen 6 as that would be illogical and as the PIC numbers show the Shades and the Black are just part of the current Aqua Terra line up, albeit with modifciations. To summarise, subjective discussions of watches are not declaritive of anything, they are just discussions. The manufacturer states there are three generations of the Aqua Terra, so one might expec tthem to know how many generations there are as they made them. This is the position for watch journalists, watch websites and the company. If one engages in a reductio ad absurdam, using your logic there are are now six generations of the Aqua Terra because the removal (or addition) of date window surrounds, polishing of bracelets, and one assumes cases, amounts to a "new generation". The use of new movements, such as Cal.8500G, Cal.8601, Cal.8602 or Cal.8605 etc does not result in a "new generation" either, they are merely additions to the range. Your position is untenable. Your assertions are wrong. It would seem that Mark Twain is as right as ever.