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Problems with backward time travel

In the beginning of this SEP article is the discussion of contradictions a backward time travel may bring (e.g. the classical grandfather paradox) and possible ways to "eliminate" them. My question ...
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1answer
35 views

Can a time-travel paradox prove self sustaining universe?

I was thinking this is more a philosophical question and not regarding the physics. Can a time-travel paradox prove self sustaining universe? Let's say, I create a time machine where I can send the ...
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4answers
85 views

Time traveler's paradox

If people were to travel back in time, change something, and return to their original time, this would create a paradox for the time traveler. To give a completely hypothetical example, consider ...
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3answers
34 views

Why the difference is measured in the absolute units (but not for time)?

I am successful at asking challenging questions. My latest victory was to ask why does python language has a special type for the time difference? I am familiar with phisics a bit. I therefore ...
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2answers
214 views

Is time travel only possible if the world is deterministic?

Let's say that true free will (and not only the impression of free will) is only possible if the world is not deterministic (meaning that the future of universe in not determined by its state at an ...
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0answers
33 views

Is the cosmological principle empircally compativle with the concept of relativity?

OK...before everyone blasts this with references to the relativistic invariance of the physical laws, time dilation, etc let me add some context. Also, I am an amateur with an interest in physics, so ...
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1answer
126 views

Can encrypted information be sent back in time while avoiding the Unproven Theorem Paradox?

Background: The Unproven Paradox involves sending a mathematical proof to individuals in the past that is obtained from the fact that there is a recipient in the past that publicly reveals the proof. ...
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4answers
128 views

What fallacy or branch of philosophy is this?

I've recently been critiquing some fluffy answers on another stack exchange and I been encountering this type of fluffy evasive answer: The question asks about the future; all future is ...
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4answers
309 views

Can an event without a cause take place? [duplicate]

I am sure there must have been several philosophers in history who have investigated this question. However finding any specific and good research on that topic is not easy. In our everyday life, ...
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3answers
120 views

Why do all consciousnesses seem to be in the present?

We exist across time, but have this special place in time called the present. In my naive thinking about the present, it doesn't seem to have any special significance except that all consciousnesses ...
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1answer
94 views

Temporally stable determination of value in consequentialism

If one is a consequentialist, one at least implicitly makes decisions based on how good or bad the consequences are. As such, you must implicitly have a function f that maps from the set of ...
3
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3answers
110 views

How can one in principle distinguish causality from observed regularity?

Hume showed that one cannot infer cause & effect in nature by induction alone. We only notice that when event A occurs then so does event B. If event A always occurs before event B we are still ...
0
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1answer
144 views

Is time “Unreal”? [closed]

In 5th century BC Greece, Antiphon the Sophist, in a fragment preserved from his chief work On Truth, held that: "Time is not a reality (hypostasis), but a concept (noêma) or a measure ...
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1answer
87 views

Transcendental Idealism and past time

According to Kant, time is part of the phenomenal realm. What would Kant say about past events such as the big bang when no minds existed? Would he say we can't know such things?
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5answers
259 views

Can anything truly be simultaneous?

I was looking at a discussion about simultaneous causation and something that came up was that all physical processes take time. So nothing can truly be simultaneous. And yet, we have philosophers ...
5
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1answer
98 views

Concepts of state and transition as used by Kierkegaard

While reading Søren Kierkegaard's "The Concept of Anxiety", I asked myself how much of the temporal interpretation of dialectic and the interaction between state and transition (leap) are original to ...
1
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1answer
120 views

Philosophical implications of supplemental “time-like” dimensions?

Philosopher John G. Bennett proposed the idea that there are actually three time-like dimensions, in addition to the usual three spatial dimensions. I would be curious to learn what the ...
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5answers
371 views

If I am infinitely old , can I have a father?

If I am infinitely old , can I have a father ? And can I have a brother that is infinitely older than me but younger than my dad ?
4
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3answers
217 views

Are the experiences of the “flow of time” and of “cause and effect” qualia?

Physics and biology has no answer about why or how we personally experience the color red and we say that the experience of the color red is a quale. Physics also has no answer about why or how we ...
4
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6answers
255 views

The speed of Time

Most of out time-measuring instruments are based on repetitive physical phenomenon. These phenomenon repeat and every time their state matches the one in our recent memory, we tend to acknowledge, ...
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1answer
139 views

Must the present be instantaneous in a non-deterministic universe?

The special relativity theory teaches us that simultaneity is relative to the motion of our reference frame. This seems to contradict the intuitive notion of the present to be instantaneous. Some ...
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1answer
136 views

Does Bergson view symbols negatively or only as a secondary source of knowledge?

In the Introduction to Metaphysics, metaphysics is defined as "that science which claims to dispense with symbols." Bergson contends that the human mind operates discursively, or by taking snapshots ...
1
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1answer
63 views

Does Asharite atomism affirm that space & time must necessarily be atomic?

I've read (probably in wikipedia but can't track down the reference now) that the Asharite strand in Islamic theology couldn't accept that substance necessarily exists pre-eternally as the Quoran ...
-2
votes
1answer
51 views

Is there a point in universe that is observable at present?

We know that we can see distant galaxies only billions years before now. We can observe the nearest stars just several years before the present. Something on the Moon can be observed only some seconds ...
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5answers
1k views

Is time a physical factor or just a concept?

When thinking of cycles and myths, one cannot pass the idea of Kronos or Kali. That brought me to form some questions about the nature of time. Three definitions for time: Time is a measure of the ...
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2answers
196 views

Does there necessarily have to be a beginning to time?

Although, I can conceive of a potentially infinite amount of time ahead of me, for it is not actual as it remains to be experienced, I can't conceive of a potentially infinite amount of time behind ...
5
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5answers
405 views

How is knowing that I am going to die influencing my life?

Does the fact that I know I am going to die make me superior in a sense to all the other living creatures that have no understanding of this event? Is the fact that I know that one day I am going to ...
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3answers
586 views

Does thermal time hypothesis finally resolve Zeno's paradox?

Is Time Just A Trick Of The Mind? (read article) Carlo Rovelli, one of the founder of Loop Quantum Gravity theory likes to think so. Furthermore wikipedia entry highlights: This position has lead ...
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3answers
166 views

If something is permanently forgotten, did it still exist? [closed]

I have a question related to the philosophy of time. If something happened, but all memory traces and records of it has been wiped out, with not even indirect records left for forensic experts to ...
2
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4answers
298 views

relative merits of presentism, eternalism and the growing block universe [closed]

What are the relative merits of the different philosphies of time. Presentism states that only the present now exists, a la Julian Barbour. Eternalism posits an object spacetime stage where everything ...
7
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3answers
555 views

Can we be Boltzmann brains? Or, how can we be sure there is no conspiracy about the past?

The way things are traditionally presented about time, there is the present, the past is fixed, and the future is open. The second law of thermodynamics is invoked. But how can we be so sure the past ...
-1
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2answers
257 views

Does time exist? [closed]

When we try to define time, we define it based on an event which happens periodically. For example, in a clock,we say that the time elapsed is 1 minute if the second hand completes 1 revolution. Here ...
6
votes
4answers
345 views

Is there a logic that takes time into account?

I hope this is neither too simple nor off-topic; I apologize if so. I have just noticed that standard sentence logic seems to make assumptions about time in determining the truth/falsity of a ...
8
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3answers
441 views

How do proponents of the Cosmological argument respond to the nature of time?

How do proponents of the Cosmological argument respond to the nature of time? Is asking what occurred before the Big Bang like asking what is north of the North Pole? ...