Bitcoin: A Miner Problem

[grarpamp]

http://qntra.net/2016/03/a-miner-problem/

That the notion of "a majority of Bitcoin nodes" is void of content,
That a cartel of Bitcoin miners is deliberately and systematically
withholding blocks for an interval of about 20 minutes to a half hour,
so as to ensure themselves a (significant) advantage over any would-be
competitors.
That neither above item makes sense or could long survive without the other