What is the "vulnerable: field in the cpe_match section of the CVEs in the NVD json feeds

Question

I have looked for a long time top find what the "vulnerable" field of the "cpe_match" section of the "configurations" is. Most of the time that field is true, but there are CVEs where it is false. For example, CVE-2003-0947:

"configurations" : {
  "CVE_data_version" : "4.0",
  "nodes" : [ {
    "operator" : "OR",
    "children" : [ ],
    "cpe_match" : [ {
      "vulnerable" : false,
      "cpe23Uri" : "cpe:2.3:a:wireless_tools:wireless_tools:22:*:*:*:*:*:*:*",
      "cpe_name" : [ ]
    }, {
      "vulnerable" : false,
      "cpe23Uri" : "cpe:2.3:a:wireless_tools:wireless_tools:23:*:*:*:*:*:*:*",
      "cpe_name" : [ ]
    }, {
    ...

I have read the specs on the NIST NVD pages, searched duckduckgo and google, and looked at other sites that talk about CPEs and CVEs. I would appreciate any help.