Philosophical theses are sometimes assailed from so many sides that, even if they have not been refuted, it becomes difficult for them to gain a fair hearing. A case in point seems to be the thesis that the sentence ‘Every event has a cause' (commonly known as the Causal Principle) may on occasion be used to assert something which, as a matter of contingent fact, is either true or false. In the interests of logical chivalry, I want to take up its defence.

My aim, it should be noted, is not to defend the truth of the Causal Principle, to claim that our world is one in which every event is causally determined by another event or set of events. So I shall have nothing to say about the arguments of those who—like the quantum physicists, Heisenberg, Bohr, and Born—claim to have shown that the Causal Principle is false; claim, that is, that our world is fundamentally indeterministic. My concern is only to establish the right of determinists and indeterminists alike to take seriously the question whether our world is in fact one in which every event has a cause.

In the Tractatus Logico-Philosophicus Wittgenstein writes:

As F.P. Ramsey pointed out, in his insightful review of the Tractatus, it is evident:

1. [i] that Wittgenstein is here envisaging a multitude of possible worlds other than the real one;

2. [ii] that Wittgenstein is claiming that, notwithstanding their diversity, all such worlds have a common form; and

3. [iii] that Wittgenstein believes this form to be somehow 'constituted' by the simple objects that exist in these worlds.

Seven half-day regional listening sessions were held between December 2016 and April 2017 with groups of diverse stakeholders on the issues and potential solutions for herbicide-resistance management. The objective of the listening sessions was to connect with stakeholders and hear their challenges and recommendations for addressing herbicide resistance. The coordinating team hired Strategic Conservation Solutions, LLC, to facilitate all the sessions. They and the coordinating team used in-person meetings, teleconferences, and email to communicate and coordinate the activities leading up to each regional listening session. The agenda was the same across all sessions and included small-group discussions followed by reporting to the full group for discussion. The planning process was the same across all the sessions, although the selection of venue, time of day, and stakeholder participants differed to accommodate the differences among regions. The listening-session format required a great deal of work and flexibility on the part of the coordinating team and regional coordinators. Overall, the participant evaluations from the sessions were positive, with participants expressing appreciation that they were asked for their thoughts on the subject of herbicide resistance. This paper details the methods and processes used to conduct these regional listening sessions and provides an assessment of the strengths and limitations of those processes.

Herbicide resistance is ‘wicked’ in nature; therefore, results of the many educational efforts to encourage diversification of weed control practices in the United States have been mixed. It is clear that we do not sufficiently understand the totality of the grassroots obstacles, concerns, challenges, and specific solutions needed for varied crop production systems. Weed management issues and solutions vary with such variables as management styles, regions, cropping systems, and available or affordable technologies. Therefore, to help the weed science community better understand the needs and ideas of those directly dealing with herbicide resistance, seven half-day regional listening sessions were held across the United States between December 2016 and April 2017 with groups of diverse stakeholders on the issues and potential solutions for herbicide resistance management. The major goals of the sessions were to gain an understanding of stakeholders and their goals and concerns related to herbicide resistance management, to become familiar with regional differences, and to identify decision maker needs to address herbicide resistance. The messages shared by listening-session participants could be summarized by six themes: we need new herbicides; there is no need for more regulation; there is a need for more education, especially for others who were not present; diversity is hard; the agricultural economy makes it difficult to make changes; and we are aware of herbicide resistance but are managing it. The authors concluded that more work is needed to bring a community-wide, interdisciplinary approach to understanding the complexity of managing weeds within the context of the whole farm operation and for communicating the need to address herbicide resistance.

Kripke, Putnam and others have proposed what is often called The New Theory of Reference. Professor Matthen thinks that this theory needs to be modified in various ways: (1) so as to avert misunderstandings about the New Theory's commitment to essentialism; (2) so as to clarify the semantic function of what he calls “nonconnoting terms”; (3) so as to answer Quinean doubts about the determinacy of ostension; (4) so as to correct Putnam's “simplistic” account of ostension; (5) so as to solve Kripke's puzzle about the seemingly inconsistent beliefs of the bilingual Pierre; and (6) so as to show how many ordinary names, contra Kripke and Putnam, can be treated as “equivalent” to definite descriptions. No doubt many of the other things he says in his paper are clever, and perhaps even true. But as to the six modifications I have listed, I have run into difficulties. To the extent that I am able to understand them, I have been forced to conclude that they are neither needed nor helpful.

We describe the growth of amorphous carbon nanofibers (CNFs) from iron-encapsulated dendrimer catalysts at ambient temperature and pressure conditions. Both fourth-generation poly (propyleneimine) (PPI) and poly(amidoamine) (PAMAM) dendrimers were suitable macromolecular hosts for the catalytic species. Average nanofiber diameters range from 10 - 15 nm, with lengths in excess of 20 microns.