老曹（长青）也早就判定蔡的博士有问题，LSE图书馆员两次回复查询都表明在LSE等三座图书馆都找不到蔡的论文

https://twitter.com/caochangqing/status/1138104287718850562

其中引述了：

伦敦政经学院图书馆员的两封回信——

Hello,

Dr. Tsai’s thesis is unavailable I’m afraid. LSE Library has never had a copy of this thesis.

All PhDs from that period were awarded under the University of London banner and would have been sent first to Senate House Library, and this being under Law would also have gone to the IALS.

Unfortunately Senate House apparently never received a copy and the IALS are unable to find their copy.

We had to make extensive searches when Dr. Tsai stood for election and I am sorry to disappoint.

Best wishes,

Ruth.

Ruth Orson
Library Assistant, Research Support Services | LSE Research Online
London School of Economics and Political Science
10 Portugal Street, London WC2A 2HD
（信的日期是2019年6月4日）

第二封回信：

I am afraid there is no further information we can provide. LSE library, Senate House Library, and Institute of Advanced Legal Studies have searched extensively for this thesis and unfortunately it is missing.

Many thanks,

Ruth.

Ruth Orson
Library Assistant, Research Support Services | LSE Research Online
London School of Economics and Political Science
10 Portugal Street, London WC2A 2HD
（信的日期是2019年6月6日）

所有跟帖： 

• 哈，原来已经有人做了此事，挖地三尺也没找到论文的下落哈！ -黄油脚- ♂ (424 bytes) () 12/01/2021 postreply 22:14:27

• 找不到不等于不存在。 -席隶- ♀ (0 bytes) () 12/01/2021 postreply 22:14:48

• 论文不存在，说明博士学位有问题。最大可能是UK政府安排LSE授予的学位，就象给卡达菲儿子的学位一样 -manyworlds- ♂ (316 bytes) () 12/01/2021 postreply 22:26:54

• 英国政府真有“远见”。 -Uusequery- ♀ (0 bytes) () 12/01/2021 postreply 23:42:14

• 英国挖坑埋雷的事儿多了去，看看中东，看看非洲和世界各地， -manyworlds- ♂ (263 bytes) () 12/02/2021 postreply 22:16:42