I am the one who disputed the claim and later deleted - I was conflicted between keeping HN largely free of political reddittery (and chose to downvote instead), and fact-checking.

> The current prime minister of India once announced that he has Ph.D. in "all of the political science".

This didn't happen, at least publicly and on record. The previous dispute was around his distance education Masters; which isn't hard to believe or hard to get. They don't attend regular classes.