Actually, you've left out the most reasonable interpretation, which is that the new pre-whatever makes the fuel reduction twenty-five times lower, so that it now takes 599.92ml per minute.
I actually removed that alternative, as the most "obviously not". Despite the fact that I also have problems with "this bus route is serviced every twenty minutes or more" (like... every two hours? That's more than 20 minutes.)[1].
But this example was specifically constructed to build in ambiguity
Specially constructed to reveal the sort of ambiguity which
language might allow.
Incidentally, I'd consider using your phrasing to mean the 550 (or 548) case to be a lie or error, anyway, because the sentence as given cannot grammatically refer to either of those cases.
Apart from not knowing the 600 (leaving you with just knowing the -2*[25 || 26] bit), there would no problem parsing without the aside clause, would there?
(You miss my point about the fusion thing
possibly generating more than it is fed, but maybe it still doesn't, and you really can't take the loose language as an algebraic invariant to work out what is meant if you don't already know if they've succeeded in turning the net energy around. You can't suddenly have N fewer beans if you started with M(<N) beans, unless you're a something like a city trader that deals with financial abstractions and "bean debt" is a possibility, but for any situation where you can then it becomes another possibility to consider.)
Look at your own phrasing, "25 'As + Bs'", and apply the mathematical laws: 25(A+B) = 25A + 25B. It has to be 25 of each.
It doesn't. "There were ten cars and lorries on that road" means ten vehicles that were each
either a car
or a lorry, not ten of each. I didn't write "25 'A+B's". But
clearly such language (or even pseudo-lingustic notation) is ambiguously misinterpretable. Which was my point, albeit described in language which can be... ambiguously misinterpreted?
It's literally just the inverse of the positive quantity. It's really simple. btw, in physics, there are occasionally used inverse unit systems for both slowness and coldness, where larger numbers are slower or colder. Thermodynamic beta, for example, is the reciprocal of temperature.
Well, Celsius (and several other scales) did actually start off "measuring coldness", partly due to finding cold, hard water (especially) a more tangible manifestation of temperature than its hotter phases and the method of translating temperature-dependant expansions of materials via a useful method of display. The Delisle scale remains (due to not much use, in the years since the 'positivity' of heat was established) pretty much the only one not flipped round. I rather like the Delisle scale!
But that's negation, not reciprical (a better example that creeps into the real world might be Mhos as the counterpart to Ohms). And, to further confuse us, gives us statements such as "it's twice as cold today". e.g. -5°C => -10°C? But that's 268K => 263K, not 134K. And if you prefer to deal in °F, that's starting at 23ish, so... maybe instead
halve it to a far colder 11.5°F? Or are we talking a range of C° (or F°, or Re°, or Rø°, or De°; luckily, in this regard, it doesn't actually matter much which) twice as much below a separately implied standard temperature[2] as the one we're comparing to? (Same sort of problems with "twice as hot", of course. Likely to be very scale-dependent as to the meaning.)
Probably better just avoiding "twice as cold", although something now sitting at "half as many Kelvin" probably is special enough for the people involved knowing how best to make sure everyone knows what that means, whether we're talking now liquified 'gas' or a not
quite so energetic a solar plasma. (With no good example in the mid-range where both before-and-after are really within easy human experience... the ice forming around a Yellowstone geyser in the depths of winter?)
(Yep, definitely off-topic. You say your thing, and I'll read it but then silently drop the subject.)
[1] And then there's the seemingly attractive "Across the store: Up to 50% discount!". ie. "never less than half price, but most/all things could still be full price without making us liars". Whereas I always wonder whether I can challenge "Up to 50% off" as 'clearly' "Up to (50% off)" rather than "(Up to 50%) off", to try to get something below half price, rather than above.
[2] Which? The one the day before the -5°C? Room temperature?
Body temerature?