If that's the case--that the contention was with "responsibility" not being quantifiable--then why take issue when I say I understand that of course responsibility is not a number to be crunched? Is this not saying precisely the same thing?
What I took issue with was your use of the word "infinite", but I really shouldn't have. The morpheme "in" acts as privative and the denotational meaning of infinite is, in part, something not measurable. However, the conotational meaning of infinite is almost exclusively something not measurable specifically because of its great size, number, degree, or unlimited nature. "Responsibility" in this instance
may not be measurable, but not because of its great size or unlimited nature. While infinite is the absolute opposite of finite, I don't think it's the logical opposite. The logical opposite is simply the negation of finite: not finite or non-finite.
"Blaming" Obama is far from silly: balancing-out the needs-and-wants of different potential constituencies is at the very core of politics and campaigning. If he is unable to do so, knowing full-well that his campaign theme as running as a in-name centrist favorable to Republicans--rhetoric which will only increase once we're in the GE--will alienate the far left and other potential Nader voters, then he's running a poor campaign based on rhetoric that will torpedo his chances of winning. The idea that the Obama campaign is not responsible for the effectiveness of its own message, and should not be responsible for alienating those for whom that message runs counter to their conscience, is I fear not a message that resonates with me at least.
You really twisted my words. I only made the banal point that Obama cannot win everyone over; not that he isn't responsible for his own campaign.
A leftist third party will siphon off votes from a mainstream leftist party. It is inevitable. Because it is inevitable it is silly to blame the candidate from the mainstream leftist party for not being able to attract every single leftist voter. Especially when the number of people likely to vote for that third party is so small compared to the number of potential centrist voters.
Look, the management of a fast-food Mexican restaurant is responsible for attracting customers to its restaurant. But if a taco stand opens up right next to it, the stand will siphon off some customers from the Mexican restaurant. It doesn't matter what the restaurant does; the taco stand will be responsible for taking away customers.