And so we are left to read the "China tea leaves", look at what China is doing and try to work out its intentions.
And so that brings me to the South China Sea. The southern part of it, close to the Philippines, is dotted with treacherous coral reefs, rocks and sandbars. Only a handful are big enough to be called islands. China, Vietnam and the Philippines have been quarrelling over who owns them for decades. But last year there was a sudden and dramatic change.
Aerial photos taken by the Philippine navy showed a fleet of dredgers anchored off one of the Chinese-controlled reefs. They were seen pumping millions of tonnes of material on to the reefs to form an artificial island.
A media frenzy ensued in which I played my own small part. I think I have a fair claim to being the first Western journalist to see the strange new Chinese islands with my own eyes.
Last July I set out on a Filipino fishing boat to try to find them. One morning, ploughing through a heavy swell 300 nautical miles off the Philippine coast, we suddenly saw land ahead where my chart said there shouldn't have been any. Even the latest Philippine navy flights had not detected any work on this particular reef. But there it was - a brand new, yellowish piece of land at a place called Gaven Reef.
This year China's work on the islands has accelerated dramatically. More than 2,000 acres of new land has been created on six reefs. In April fresh photos showed the outlines of a runway beginning to be laid on one.
So what is China up to? Some pro-Beijing scholars have tried to claim the islands are for both military and civilian use. There will be lighthouses and shelters for fishermen they say.
Well maybe, but Beijing is not spending billions of dollars on huge land reclamation hundreds of miles from its own coast to help fishermen. These islands are military and strategic. China is alone in claiming the whole of the South China Sea. Now it is creating "facts on the ground". That runway is not for tourist flights.
A few weeks ago a US surveillance plane deliberately flew close to the new islands. The crew recorded the immediate and angry Chinese response.
"Foreign military aircraft, this is Chinese navy," the operator announced, "You are approaching our military alert zone. Leave immediately!" The warning was repeated with growing irritation until the radio operator was left spluttering, "You go!"
There is nothing in international law that says China can build islands on submerged reefs far from its own shore and then declare them military no-go zones. But that is not stopping Beijing from doing so.
And so that question arises again. What is China's intention? Does it really intend to use these islands to try to enforce its claim to the whole of the South China Sea? Will it really try to exclude other militaries, including the US from entering these waters and airspace? If so there is going to be trouble.
