static new ThreadLocal<Bool> ai_postTriple_verified;
static new ThreadLocal<Bool> ai_postTriple_recursion;

static S ai_postTriple(T3<S> triple) {
  // check, clean
  
  ping();
  if (triple_anyPartNull(triple)) null;
  triple = trimTriple(triple);
  if (!ai_tripleAllowedToPost(triple)) null; // fail("No");
  
  // existing?

  if (has(triple)) null;
  
  // invalid?
  
  if (has(ai_tripleToInvalid(triple))) null;
  
  // post verified?
  
  bool ver = !isFalse(ai_postTriple_verified!);

  // post handler?
  
  AI_PostHandler handler = ai_postHandler();
  T3<Symbol> striple = toSymbolTriple(triple);
  if (handler != null && !isTrue(ai_postTriple_recursion!)) {
    ai_postTriple_recursion.set(true);
    try {
      ret strOrNull(handler.postTriple(striple, ver));
    } finally {
      ai_postTriple_recursion.set(null);
    }
  } else {
    // post web the normal way
    Web web = webFromTriple(striple);
    web.unverified = !ver;
    postSoftwareMadeWeb(web);
    ret web.globalID();
  }
}

static S ai_postTriple(S a, S b, S c) {
  ret ai_postTriple(t3(a, b, c));
}