Question:
They seemed to be reminiscing over old times.

Does it follow that "They had no memory of anything. "?
Answer:
no

Question:
But this bit of gratuitous groveling pales next to the sins of others--both those who remained Stalinists into the 1950s and those who did not just acquiesce in, but advocated, McCarthyism.

Does it follow that "The current affairs are worse than Stalinists and McCarthyists."?
Answer:
no

Question:
Faithful to the policy of separating the British cantonment from the Indian quarters with a railway as the barrier, the new city built for the Empire's Indian seat of government is separated from Old Delhi by the line running from Amritsar to Agra.

Does it follow that "The residents of Old Delhi were prohibited from crossing the railway line."?
Answer:
it is not possible to tell

Question:
I met Susan six months ago.

Does it follow that "Susan and I are friends."?
Answer:
it is not possible to tell