Video-conferencing was a big hype in the 1990s when it was promoted as a way to replace traditional meetings. As with much hype, it was followed by a "disillusionment" phase.
People simply preferred traditional meetings. In the meantime, video gradually entered into international conference rooms and meetings. Today, it is normal to have the keynote address delivered via video. Here is an example of one of fathers of the Internet, Vint Cerf, addressing the 4th Annual Meeting of the Internet Governance Forum in Sharm El Sheikh, 2009 (video by Seiiti Arata).
Louise Lassonde (Coping with Population Challenges, London: Earthscan Publications Limited, 1996, 7) provides the following example: "In the Cairo Programme, various formulations which were contradictory a priori were worded in such a way as to satisfy all parties. This is what happened in the controversy over abortion, which was circumvented by means of a wording that satisfied all groups. It reads as follows:
Arguments can be found both against and for the use of ambiguity in diplomacy. Opponents point out that an ambiguous formulation in a treaty or agreement does not actually resolve a problem but simply puts it off until a later time, or allows the parties to the agreement a means of avoiding their obligations. Proponents respond that in a conflict, any tactic that brings an end to actually physical violence is useful and valuable.