Regarding Superdelegates -- Sanders Supporters Have Been Lied To

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30. Abramson cites exactly nothing for the claim that the DNC assured anyone that Superdelegates

wouldn't publicly declare for one candidate or another until the primaries/caucuses were done.

I'd like to see evidence of any such statement being made since it would be a departure from the reality of previous election years.
For example, you can find a list of the 2008 superdelegates at this cite: https://en.wikipedia.org/wiki/List_of_Democratic_Party_superdelegates,_2008

Dozens and dozens of them committed in advance of the close of the primary/caucus season, many months and months before.

And if Sanders' and his supporters were "lied" to about when superdelegates would commit to a candidate, why didn't they publicly disown the superdelegates that committed to Sanders. After all, when Suprdelegate Erin Bilbray announced in December 2015 that she was endorsing Sanders, the Sanders campaign put out a press release welcoming that endorsement, not suggesting it was premature.