I'm leaning towards you not understanding what a property is, or maybe you're trolling. I've mentioned two properties of time. That time is continuous, and so is its motion or rate of flow, means it can only go one way, because if it didn't it would be neither continuous, nor constant. Now would it?
In science, property means a characteristic or trait that you can use to describe matter by observation, measurement, or combination. https://study.com/academy/answer/wh...ns a,observation, measurement, or combination. So you contend "continuous" and ? , sorry cannot find the second property you claim is present Care to enlighten me? Please Register or Log in to view the hidden image!
You see arfa, either you are contradicting yourself, or you have no idea what you are talking about. Early on in this thread - your thread - you suggested there was a Lie group that described time symmetry. But a group - any group, Lie or otherwise - has an inverse. It wouldn't be a group otherwise "now would it?" Now you imply here there is no inverse, therefore no continuous symmetry group (at least by my logic). Which is it?
I'm not contradicting anything. I said that time is continuous, which means 'motion' in the one dimension it 'has' or 'is', means one and only one direction can be possible, without violating the locally observed linear flow rate. Which is to say, motion of a point along a time 'axis' breaks a symmetry. There are no 'time laws' in physics that say why time is like this, or why anything would be different (apart from the discontinuities). if time could flow into the past.
No, I said all the continuous symmetry groups are Lie groups. I said time is continuous; topologically a 1-manifold, with a translation invariant. I'd like to call this invariant a "clock symmetry". Translating into the past or future of any clock should not change the rate the clock 'ticks', locally. Or in a universal context, since time began it has 'flowed' at the same rate and the speed of light has stayed invariant, therefore the entire history of the universe has translational time symmetry (any clock we can construct would work the same billions of years ago as today).
The Bohmian "Wholeness"......Please Register or Log in to view the hidden image! Question; Why is it necessary for Time to exists before there is need for Time as a chronolgy and duration of existence in some expressed physical form?
Time translation leaves clocks, hence units of time like seconds or years, invariant. That means translation is an identity operation on clocks/intervals of time. Like a translation in the plane leaves an object with the same orientation (modulo any orientation-preserving symmetries). Translate a letter like B, and it still looks like B, etc.
For most of its history, the second was defined as a fraction of the average solar day, based on the position of the sun in the sky. One second was exactly 1/86 400 of the average solar day. https://www.lgcgroup.com/newsroom-and-blog/blogs/si-redefinition-and-the-second/ Please Register or Log in to view the hidden image!
Suppose there is no clock? The clock has to exist for it to create a durable continuous chronology of its ticking, no?
Then there are no intervals of time and no constant speed of light. For one. In this universe there are clocks and intervals of time. What do you think made humans use lunar calendars? Is the orbit of the moon around earth a natural timekeeping system, perhaps?
The point you're making here is that a unit of time is an arbitrary, in this case anthropocentric, choice. I already made the point that I'm free to choose a pendulum or similar oscillator, as having a unit period, so seconds don't appear; my choice of a unit of time does.
How does that follow? What does human activity have to do with time? You are asking the wrong questions. Do regular orbits "keep" time or do they "create" time? Does time exist in the future? If a clock keeps time where is this time stored? Inside the clock? If there is no clock of any kind, where does time go? Does time require time to exist? Can you measure time with time?
So my choice - second, also your choice - pendulum or similar oscillator, BOTH choices are NOT invariant Write4U can handle the rest of your rubbish Please Register or Log in to view the hidden image!
This may be of interest; Records management theory Records life-cycle[edit] Main article: Records life-cycle Records continuum theory Main article: Records Continuum Model https://en.wikipedia.org/wiki/Records_management#Records_life-cycle Records continuum model (Redirected from Records Continuum Model) Please Register or Log in to view the hidden image! The records continuum model https://en.wikipedia.org/wiki/Records_continuum_model IMO, Time is a human cognition and symbolization of measurable duration intervals associated with the creation, existence, and chronology of all change resulting in physical expression.
How would you know the speed of light, or of anything, if no clocks existed? You asked "suppose there is no clock". But there are always clocks. Good question. What does any activity have to do with time? Perhaps it's only that activity is only possible if time exists.
Not so Any activity can exist and happen. Who determines if it should be timed is the correct question? If there is no requirement for any activity to be timed, don't bother. If you want it to be timed then select your arbitrary time units and time it Since all time units are arbitrary I maintain the position fundimental TIME does not exist and what is commonly put forward as time is a invented CONCEPT How you going with that list of properties of TIME? Please Register or Log in to view the hidden image!
Actually we don't know the actual speed of light except as a relative constant value as measured against external conditions. All human numbers are symbolic representations of relative and relational values, but have real existence in reality. The relative values exist, the human record keeping is formalized, symbolized, structured for human convenience. This is why Einstein could propose that time actually stands still @ SOL . If Time existed as an independent continuous plenum, how could it stand still? Because it's all relative...Please Register or Log in to view the hidden image!
Strawman. We do know that our units of time and distance give us the speed of light in our units. We also know there is no reason to suppose they are different anywhere else in the locally-observable frame.
So, an activity can happen. Is that because there is time for it to happen? What does that have to do with measuring units of time?