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To answer the question posed by the title of this article, we sketch what we mean by the concepts of civility and argument and engagement; note the ways in which the rise of partisan media menaces civil engaged argument; and close with analysis of an exchange between a prominent Democrat and Republican that illustrates the importance of common definitions and sources of trusted evidence.
Lithium borohydride, magnesium hydride and the 2:1 “destabilized” ball milled mixtures (2LiBH4:MgHM2) underwent liquid phase hydrolysis, gas phase hydrolysis and air oxidation reactions monitored by isothermal calorimetry. The experimentally determined heats of reaction and resulting products were compared with those theoretically predicted using thermodynamic databases. Results showed a discrepancy between the predicted and observed hydrolysis and oxidation products due to both kinetic limitations and to the significant amorphous character of observed reaction products. Gas phase and liquid phase hydrolysis were the dominant reactions in 2LiBH4:MgH2 with approximately the same total energy release and reaction products; liquid phase hydrolysis displayed the maximum heat flow for likely environmental exposure with a peak energy release of 6 (mW/mg).
Neanderthal diet is explored by examining stone tools found at the site of La Quina for residues and microwear. The Neanderthal people are found to be using their scrapers for working plants and woods as well as meat.
It is a startling experience to look down a microscope at a stone tool — a real Palaeolithic artefact, not a modern thing or a replicated copy — and see on its flint surface grubby brown-red stains that look the colour of old blood. Is a consensus emerging from the archaeological scientists as to just what traces of, especially, biological materials do survive on ancient stone surfaces, where they can be reliably characterized and identified?
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