Heuristics: Principles, causes, and the marketplace of ideas

Some heuristics in regards to these subjects:

Principles

Principles are those fundamental truths that underlie our reason for saying and doing the things we do. Our principles are affected and shaped by our upbringing, schooling, and community. 

How important is it to maintain a strong adherence to the principles you define as your core principles? In an argument? In general conversation? All of the time?

How much allowance should you give someone in a particular conversation to sway in regards to their principles? 

How realistic is it maintain a set of principles from previous generations? From the texts we read? 

Causes

Essentially, a cause can be defined as a principle (or set of principles) or movement that should be militantly defended. 

What is the cause being presented by an individual or group? 

Is the cause easily identified in the individual or group's literature? Speeches or scripts? Videos? Website? Conversation? 

What are the theoretical underpinnings of the cause? 

What is the level of commitment to the cause? Risks? Costs? 

The marketplace of ideas

The marketplace of ideas is founded on the philosophical ideas presented by John Milton in his 1644 text, Areopagtica, and  in John Stuart Mill's 1859 text, On Liberty. Essentially, the notion of the marketplace of ideas is that "truth will prevail" in an open exchange of ideas. Ingber (1984) sates, "The imagery of the marketplace of ideas is rooted in laissez-faire economics" (Ingber, p. 5).  This concept has been extended to include the freedom of speech and expression. Ingber says:

"A diversity of perspectives first requires a corresponding diversity of social experiences and opportunities. Consequently, in spite of the rhetoric surrounding it, freedom of speech by itself cannot ensure a diverse and interactive marketplace of ideas" (p. 86). 

Ingber continues: 

"If we intend to design a social and political system open to the development of diverse perspectives and values, we must first understand how an idea initially outside the community agenda of alternatives becomes accepted within it" (p. 86).  

Gordon (1997) has criticized the use of "the metaphor of the market," stating that it "is inappropriate and inconsistent with Mill's text " as well as the "further consequences of accepting the metaphor to describe Mill's view of free expression" (Gordon, pp. 246-47). 

Will the truth generally prevail in a marketplace of ideas? 

How accurate is the phrase "the marketplace of ideas" in a modern context? 

Sources

Gordon, Jill. (1997). "John Stuart Mill and the 'The Marketplace of Ideas.'" Social Theory and Practice, 23(1). pp. 235-249. 

Ingber, Stanley. (1984). "The Marketplace of Ideas: A Legitimizing Myth." Duke Law Journal, 1, pp.1-91. 

Mill, John Stuart. (1859, 2013). On Liberty: A Translation Into Modern English. Translated. Industrial Systems Research. Manchester, England. https://books.google.co.uk/books?id=cVWlg2ex_AkC&pg=PR1&source=gbs_selected_pages&cad=2#v=onepage&q&f=false 

Milton, John (1644). Areopagitica, A Speech of Mr. John Milton for the Liberty of Unlicenc'd Printing to the Parliament of England (1 ed.). London. Google Books https://books.google.bg/books?id=nejQAAAAMAAJ&dq=areopagitica&pg=PP13#v=onepage&q=areopagitica&f=false