I don't see anything that leads me to believe that the usage of "the" is referring to a singular opportunity to attack. It could be used interchangeable with "an" in that sentence.
"Everyone should have the opportunity to see Paris" is the same thing as "Everyone should have an opportunity to see Paris".
But you have to look at the language in context (and remember that it is part of a self-contained rule set - not a generic statement). The rules relating to a destroyed ship remaining in play are meant to prevent that ship from losing its opportunity to attack. You should be skeptical of the conclusion that an unrelated future rule removes the benefit of a ship destroyed by another with an equal pilot based on a technicality.
There is an ambiguity. In my interpretation, the "the" quoted in a previous post is sufficient to make the language, at a minimum, unclear. The designers could have used "an," but they did not.
There is nothing in the context of that paragraph that refers to a specific opportunity to attack though.
Except the word 'the,' which, as you know if you are a native english speaker, can be used to a unique instance of something.
Think of it like this:
Did that guy get eaten by THE dinosaur?
Did that guy get eaten by A dinosaur?
The first is referring to a specific dinosaur, meaning that an affirmative response would require that the exact dinosaur that the asker is referring to. For the second, any dinosaur would do. Going back to the first, there is no need for the asker to explicitly state which dinosaur it is referring to as the context makes it clear that there is only one dinosaur that is the subject of the question. Similarly in the main rules, as far as I know, there is only one opportunity to attack that is listed.
Most importantly, FFG could have written the relevant rule to read "AN opportunity to attack" as opposed to "THE opportunity to attack."
I believe that the rules heavily favor being interpreted. Again, the handling of this interaction pursuant to the rules is ambiguous at best.
Agreed, it's quite unfortunately and unnecessarily ambiguous, but the spirit of the rule seems to be referring to ships activating for combat at the same PS.
