Knowing

epistemology, science, kinds of knowledge, methodology

Two ways to symmetry

There are two ways in which the length and the time (duration) of a motion are symmetric. The better-known way is the use of a conversion factor, notably the speed of light, which is the same for all inertial observers. All lengths can be turned into time intervals or all time intervals can be turned […]

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Pluralism in science

I previously wrote about pluralism here. Science is usually considered monist in various ways: there is one scientific truth, one scientific reality, one scientific method. This leads to having one scientific theory for each subject, if at all possible. The single scientific method is the easiest to critique: each branch of science has its own

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Metaphors for time and space

George Lakoff and Mark Johnson have a chapter on time (Chapter 10) in their book Philosophy in the Flesh (Basic Books, 1999) that makes several points: All of our understandings of time are relative to other concepts such as motion, space, and events. (p.137) Most of our understanding of time is a metaphorical version of

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More equations of motion

Expanding on a previous post here, this is a summary of the equations of motion for space-time and time-space. See also a pdf version in the Time-space Glossary option above. s = displacement magnitude, t = time magnitude, v = velocity, v0 = initial velocity, a = acceleration, w = lenticity, w0 = initial lenticity,

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Relating space and time

In a sense, every distance can be converted into a duration or vice versa: simply multiply duration by the modal speed or multiply the distance by the modal pace. For example, every time can be multiplied by the speed of light in a vacuum and so be replaced by a distance. This is usually done

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Parallel equations of motion

Expanding on the previous post here, this is a summary of the equations of motion for space-time and time-space. See also the Time-space Glossary option above. r = displacement magnitude, t = time magnitude, v = velocity, v0 = initial velocity, a = acceleration, w = lenticity, w0 = initial lenticity, b = relentation. Space-time

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Temporo-spatial glossary

I’ve compiled a glossary of new terms on the top menu of this blog, or see here. These terms were coined for the study of 1D space + 3D time. It will be updated as needed. A parallel comparison of spatio-temporal and temporo-spatial terms was added here.

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“Synchronizing” space

An isodistance map shows the contours of equal distances from a central point. These would be circles on a map if distance is measured “as the crow flies.” The shapes vary if distance depends on a road network: But how do you tell if two distances are the same? Different observers have different distance measuring

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Characteristic limits

I have written about the characteristic (modal) rate for a mode of travel. This rate provides a factor for converting spatial into temporal measures and vice versa. The characteristic rate is the maximum (free flow) rate, though it could be the minimum rate. A characteristic rate is independent of any and all particular rates in

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