Charts, maps and models which are used to demonstrate or explain matters are not evidence themselves, but testimony based upon such items and marks on such material may be evidence.
After his presentation on his robotics research, I cornered Brian Scasselati of Yale University to see if he could explain why it matters so much that robots appeal to humans.
Even when they do not, he never tries to explain why a variable matters.
Those numbers explain why power density matters so much: if you start with a source that has low power density, you have to compensate for that low density by utilizing more resources such as land, steel, and ultra-long transmission lines.
So Netflix's founder and chief executive, Reed Hastings, tried to explain himself and made matters far worse.
Mr Gross denied any wrongdoing, but his clumsy attempts to explain his personal finances only made matters worse.
As Cynthia would explain, a certain candor about such matters was an integral part of their fellowship in a place where they had so little else to entertain them.
The political dimension of these cases may explain federal and state regulator reluctance in investigating public pension matters.
What matters is that you thought your way there and can explain why you believe it.
But the president of the three-man tribunal interrupted the former butler when he tried to explain why he felt Pope Benedict was not sufficiently informed about "certain matters".
This detail hardly matters now at a time of such national sorrow, but if it helps explain why a large, modern and technologically-advanced country like Poland was flying such an old plane, perhaps that is of some small assistance.
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