As long as we have first-past-the-post, winner-take-all elections, it is one's rational self-interest to vote strategically against the party they least want to win, rather than for the party they most want to win.
You're being very myopic there. If you ever want B to become more like C, you must be willing to accept B losing in the short term. If B sees many of their votes going to C, then they'll move C-wards to pick up more votes. You have to think long term. Don't think in terms of C winning, think in terms of turning B into C, or at least something close enough to C that you're happy with them.
Side-note: I have never understood why the Republicans pander to the religious extremists - would those people ever vote Democrat? What do the Republicans have to lose by trying to pick up some moderates?
Those quantities are certainly mathematical dimensions. What is meant by 'hidden dimensions' is hidden spatial dimensions, i.e. directions, orthogonal to the perceived three. I've not kept up with the field, but last I recall these were theorized to be rolled up on very small scales. So something could move 'in the purple direction' by ±1e-9m at most - moving +2 being the same as moving -1 in a simplified version, as it's rolled up like a straw (iirc there are far more complicated shapes suggested for these dimensions).
One possibility of detecting these is if gravity isn't confined to the normal three dimensions, then at small scales it will not obey an inverse square law, but will 'bleed off' into the other small dimensions. Tests have been made to submillimeter scale, but that's far larger than I believe has been posited for the size of the extra dimensions.
In order to be qualified as a SolarCity supplier, manufacturers need to have effective Quality Assurance programs and refined manufacturing processes in place, and steady product and manufacturing quality must be demonstrated. Rigorous tests need to be passed on an ongoing basis, performed by a qualified 3rd party lab. Furthermore, we require that factory controls and in-line testing are in place to ensure quality is sustained over time and deviations are rapidly detected, so the deployment of faulty products in the field is prevented.
Exactly. This is what those preferring to vote for the 'lesser of two evils', instead of the 'good, but unelectable' always miss: you can't push the party closest to your preferences closer to your preferences by voting for someone that's moving the party away from your preferences, even if the opposition is worse. You must be willing to lose in the short term to gain in the long term, or you'll just keep repeatedly losing in the short term while complaining that your vote doesn't matter. (not referring to the parent poster specifically)
The Democrats, for example, have no reason to move further left if all Sanders supporters vote for Clinton - if that happens, then as they see it, Clinton satisfied everyone fine! Maybe the next candidate can be even further right to pick up some Republicans! Whereas if they lose the election because of Sanders, the next candidate will have to move further left to capture those people they lost the previous election. Note that my example is a bit simplified onto a single-axis system for the sake of simplicity; at least some Sanders supporters would prefer Trump to Clinton.
Always look over your shoulder because everyone is watching and plotting against you.