Course: Question Reality! Science, philosophy, and the search for meaning
Length: 6 weeks, 2-4 hrs/wk
Instructors: Marcelo Gleiser
Quote:How much can we know of the physical world? Can we know everything? Or are there fundamental limits to how much we can explain? If there are limits, to what extent can we explain the nature of physical reality? RealityX investigates the limits of knowledge and what we can and cannot know of the world and ourselves.
We will trace the evolution of ideas about the nature of reality in philosophy and the natural sciences through the ages. Starting with the philosophers of Ancient Greece and ending with cutting edge theories about the universe, quantum physics, and the nature of consciousness.
Current events have a lot of us questioning reality these days. Different type of questions, though. The main questions in this course are outlined above: how do we know things, and how much is it possible for us to ever know? The course combines philosophical and scientific explorations, and proceeds chronologically from the pre-Socratics to the Renaissance to Einstein to the present day. Prof. Gleiser is a theoretical physicist specializing in particle cosmology, and the course roughly follows his book The Island of Knowledge, written for the general science reader.
I’ve taken three or four of these science/philosophy courses, and each time I get a little more comfortable. This one is pretty introductory, and it hits all the “ooooh, cool” spots (How would we know if we’re brains in vats? Why should we care about Schrodinger’s cats?) without requiring reading anything beyond Gleisner’s NPR blog articles. I have to say I found his explanation of electron orbits to be the most helpful one I’ve encountered, though it’s possible I’m just now at the point where I’m ready to start understanding things like what standing waves have to do with quantum theory.
Each week started with a great feature: an ungraded What Do You Know pretest, full of questions that range from factual (T/F: Violet light has more energy than red light) to conceptual opinion (Agree/disagree: Mathematics is something we invent; Reality only exists in our minds). These questions are repeated at the end of the week, offering concrete evidence that something was, indeed, learned, even if only a better definition of “reality”. Material also included a video lecture and several interviews with other philosophers and scientists on the topics covered. A few graded multiple-choice questions were scattered through the material, along with several short written assignments in the form of posts, journal entries, and short self-graded essays. A Reddit AMA with Prof. Gleiser finished off the week.
The discussion forums were active and I got into some excellent discussions along the way. I also enjoyed a project from the first week: understanding a pendulum’s motion. Now, I took the easy route and used the available online pendulum simulator, because I’m a klutz, but it was an interesting way to play around with the topic of observation and experiment.
I found myself often confused by the logistics of the course, so I just plugged away at whatever looked interesting, be it posting on a discussion or self-grading an essay or answering questions (though I never did find the Learning Journal). I say that a lot, don’t I. In this case, the multiple evaluation options were complicated by a bilingual approach: the course was offered in Portuguese as well as English, with all written material in both languages so everything appeared twice. I wholeheartedly support broadening the appeal to include more people worldwide, and I would rather deal with my befuddlement than restrict the audience. It’s a tough problem, and I applaud them for taking it on. I got used to the double-entries after just a few weeks; if more courses took this approach, we’d all get used to it, and it’s a small price to pay for inclusion of those who would otherwise be unable to participate.
One of the great discoveries for me in the course was another book, mentioned in Week 3: Steven Greenblatt’s The Swerve: How the World Became Modern . I’ve only gone through 80 pages, but it’s wonderful: Poggio, Medieval Book-Raider, goes among the monks to rediscover Lucretius and atomism as Europe turned towards renaissance. Manuscripts, history, philosophy, science, the classics, all packaged in a wonderfully told story: who could ask for more.