Hornsby on Actions And Activity: Summary

Is the raising of someone’s arm one event or two? Is the event `I raised my arm’ identical to the event `my arm rose’? Resolving this question should throw light on what an action is. We also need to know whether an event which goes on for a period is going on during all instants of that period, for the same reason.

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There is a distinction between `A stroll was going on at t’ and `strolling was going on at t’. The former at least seems to require an agent – but Hornsby’s point is that the latter does not seem to rely on any particular event (a ‘stroll’) taking place. Strolling is an activity – it must have a duration, as must `raising one’s arm’.

Actions are like stuffs. Saying `there is beer in the fridge’ does not refer to any particular can of beer or any particular beer atoms. There just has to be some in there, if the claim is to be true. Likewise, a stroll can be taking place without any particular event of strolling being necessary – distinguish this carefully from the very similar appearing but completely different claim that a stroll can be taking place without any event of strolling being necessary.

Q: Hornsby also seems to want to remain open to the possibility of the latter claim. Does she need this? Is it plausible?

This brings in the agent. There can be no strolling by Sebastian unless there is an activity of strolling being done by Sebastian. Note again that there need be no event of strolling by Sebastian going on, on Hornsby’s line.

Hornsby claims that “just as beer pervades any volume of space occupied by beer, so strolling pervades any interval of time occupied by strolling”.

Q: these claims do indeed appear to stand or fall together, but both are highly questionable from a physics/chemistry perspective. There are no beer atoms, but even if there were, what would we say about the space between the atoms? – should such a space be a coherent idea. Similarly, time quantisation at micro-intervals may make it difficult to talk about anything pervading them. Does anyone stroll during an interval in which light would travel a billionth of the diameter of a proton? Does that make any sense?

There is a useful distinction between accomplishments and achievements, due to Mourelatos. The latter are punctate: Mary’s finding the book ceases when she finds it. It would not become the case that she was finding the book until she finds it, when there is something a little like backwards causation – it becomes the case now that what she was doing then was finding the book – if she finds it. Accomplishments do not have this character: strolling can have its character as strolling from the point it begins and it continues until it ceases. Achievements are not composed of activity but accomplishments are. It does not take any time for John to win the sprint.

Q: really? Not even a 100 billionth of a second?

See Also:

#Proust On #Memory

Links Between Schopenhauer And Apocalypse Now

Nozick’s Claim That Knowledge Is Truth-tracking: A Critical Evaluation

Merleau Ponty’s Phenomenology: What Is It And How Cogent Is It?

 

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Author: Tim Short

I am a former investment banking and securitisation specialist, having spent nearly a decade on the trading floor of several international investment banks. Throughout my career, I worked closely with syndicate/traders in order to establish the types of paper which would trade well and gained significant and broad experience in financial markets. Many people have trading experience similar to the above. What marks me out is what I did next. I decided to pursue my interest in philosophy at Doctoral level, specialising in the psychology of how we predict and explain the behaviour of others, and in particular, the errors or biases we are prone to in that process. I have used my experience to write The Psychology of Successful Trading. In this book, I combine the above experience and knowledge to show how biases can lead to inaccurate predictions of the behaviour of other market participants, and how remedying those biases can lead to better predictions and major profits. Learn more on the About Me page.

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