Category Archives: Philosophy of Time

Marriage and Time Travel

Here’s a thought. Assume all the standard Catholic stuff about the sacrament of marriage, such as its indissolubility until the death of at least one of the two spouses. Suppose you get married, and then at some later point, while … Continue reading

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Grandfather’s Quantum Time Machine?

I tried to suggest in a recent post that perhaps we can think of an example of something which logic precludes, and physics does not, and I gave the example of a time-travel based paradox called the Grandfather Paradox. Perhaps, … Continue reading

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Grandfather’s time machine; Physical possibility and logical impossibility

I have been tempted in the past to construe the relation of physical possibility to logical possibility as injective (i.e., that all physical possibilities are logical possibilities) but that there are many more logical possibilities than there are physical possibilities … Continue reading

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The Difference between Physical and Temporal Antecedence

My purpose in this post is simple; I want to demonstrate that physical antecedence is not coextensive with temporal antecedence and vice versa. You can have one without the other. This reflection leads to a very weak argument against the … Continue reading

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A logically possible world without time – and time’s smallest units

Let’s deny Newtonian Absolutism about time. Now let’s say that there are two balls related to each other in some set of ways, and that nothing other than those two balls exists. Let’s also say that these balls are at … Continue reading

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Logically Possible Mind Independent Temporal Relations

In order to have a logically possible world without any subjects who experience anything like time’s flow, and still have B-theoretic temporal relations such as ‘earlier-than’ or ‘later-than’, one simply has to be a realist about B-theoretic properties, and state … Continue reading

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Grim Reapers, Times and Events

The Grim Reaper paradox was, a while back, used by both Alexander R. Pruss and Robert C. Koons to try to run a tenseless kalam cosmological argument for the existence of God. A little later, on Pruss’ blog, there were … Continue reading

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A Green Ball, a Blue ball, a Grue ball, and Transubstantiation

It is even more difficult to produce an angel from a stone than to produce it from nothing, because to make an angel from a stone, insofar as that can be done, the stone must first be annihilated and then … Continue reading

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B-Theory ⊃ Platonic Forms

The B-theory of time states that any two moments in time t1 and t2 bear a relation to one another of one of the following three varieties: ‘being later-than’ ‘being earlier-than’ or ‘being simultaneous-with’ (where t1 is identical to t2). … Continue reading

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A-theoretic time travel, B-theoretic time travel and Pruss

Pruss recently wrote an intriguing post on his blog where he argued that time travel might be possible on the A-theory. I used to disagree (and am not now sure), but I think his post can help clarify why time … Continue reading

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