Sentence:  “Number two is that for reasons which I regarded at the time as <WSD>specious</WSD> and insulting, the Americans objected to your husband's presence on that committee not three weeks after it met, and asked me to replace him with somebody more to their liking. Since Magnus was kingpin of the Czecho operation and of several other little shows in Eastern Europe besides, this was a totally unrealistic demand." 
Meaning of the word marked with <WSD> tags:  Seemingly well-reasoned, plausible or true, but actually fallacious.