
[these resolution criteria are a work in progress for the next several days and may change. caveat mercator]
This market resolves to YES if during 2025:
- People's Republic of China or affiliated military or maritime forces physically prevent vessel access to any of Taiwan's main ports (Kaohsiung, Keelung, Taichung, Taipei, or Hualien) 
- And one of the following sources confirms a "blockade": AP, Reuters, Financial Times, NYT, Taiwan Defense Ministry, US Defense Department, Japan Defense Ministry, or NATO 
Edge Cases:
- "Military exercises" that meet the above criteria DO count, even if labeled as exercises 
- Blockades starting in 2025 and extending to 2026 COUNT 
- Failed blockades COUNT if China made a clear attempt meeting the criteria, even if Taiwan/allies successfully defended against it 
- Blockade of outlying islands only (Kinmen, Matsu, Penghu) does NOT count 
- Cyber attacks or economic sanctions alone DO NOT count without physical maritime enforcement 
- Can you add "and" to clarify the 2 points under "This market resolves to YES if during 2025:"? 
- Suppose that an announced blockade / "we're not calling it a blockade for reasons" (like a Maritime Exclusion Zone) is seen as sufficiently credible that third-country civilian shipping drops precipitously without a single physical enforcement action by PRC-affiliated forces. How do you want this question to resolve? (Though maybe the US would use escorted convoys for allied shipping.) 
Point 2 ties back to @ian's point about verifying reduction of maritime traffic, which seems closer to what we actually want to measure โ physical enforcement is possibly more a means to an end.
Does anyone have access to either Taiwan International Ports Corporation's official website for eg. cargo throughput statistics for the Port of Kaohsiung, or MarineTraffic.com?
@puffymist 2. PRC needs to physically deploy ships, drones, etc around Taiwan to enforce a blockade. Economic or other forms of blockade (which could lead to a reduction in naval traffic) are excluded.
I think specifying a specific threshold for maritime traffic reduction could be bad and lead to situations where this market resolves no on a technicality.
@SG Thanks. I too learn a lot from reading question creators' explanations.
Additional question: in "physically prevent vessel access to any of Taiwan's main ports", do you mean preventing access to at least one main port, or preventing access to all main ports?
@JoshuaWilkes Disagree, if there is a credible naval threat, there may not be any ships which attempt to pass the blockade. In general, over-specification is a big concern for this type of market. It would be bad for a blockade to occur but for this market to resolve no based on a technicality (e.g. there less than 50 intercepted vessels, it only lasts 23 hours, etc.)
@SG oh that's okay, I am more worried about the reverse case, where only one ship is intercepted and it's not a blockade but this criterion is interpreted or insisted to have been met
Seems like way too many words, I think all you need is #3.
How are you going to verify:
The blockade must reduce maritime traffic to affected ports by at least 50% compared to the average daily vessel count from the preceding 30 days
Who cares about this if it's in fact a blockade. What if it's 51 miles?
Maritime interference must occur within 50 nautical miles of Taiwan's coastline
Why at least 3 ports?
@SG good way to stay objective is to not bet on your own markets. I would also advise against deferring your resolution criteria to LLMs, that's how we got an in-browser demo to count as "millions of downloads of AI game".
https://manifold.markets/CDBiddulph/will-a-video-game-with-airendered-g-2e37a190fefe