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Originally Posted by dave conz
Definitely my last post. I'm heading out the door.
Correct up until the last sentence. Perhaps I'm being pedantic but since time is a feature of this Universe and does not exist outside it, there is no such thing as "before BB". The concept of "before" simply doesn't apply.
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Yup, in a way you're right, since we may have a problem with the tools we use, i.e. language and semantics. I would argue that the use of the word "before" doesn't necessarily imply the existence of time at point < 0 where 0 is the beginning.
Still, it appears that the physical universe had a beginning. Whatever exists physically has a beginning, and therefore must have a cause (not necessarilly to be confused with a "reason to exist"). That cause, in the case of the physical universe could not have been physical, since nothing physical existed of the universe at a point < 0. That point could be possibly defined as the moment of the initial BB explosion minus Planck Time. This seems logical since BB doesn't offer any information about 0 time of the universe's history, but starts at the first 5.391 × 10-44 seconds. Thus, even your postulate that "before" doesn't apply in the context of BB has no merrit. Time did exists before BB, it lasted 5.391 × 10-44 seconds.
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Originally Posted by dave conz
BTW, by "conventional science" I mean the general concensus (wherever possible) of scientists in the Western world. I certainly count Einstein's GR and SR theories as being part of conventional science.
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Fair enough, albeit pretty general. I don't know why would you mention the notion of Western World. Doesn't "Western World" derive lots of it's knowledge from the time before the Western World even existed? Our dear number zero comes from a world that is very much eastern. There is really not much to 0 but we can't live without it
As for the "general concensus; c'mon. You can't be serious. In Poland where I come from, 95% of people are Catholics, or at least they say so. That's as close as you can get to a general concensus. Does that mean thet God exists in Poland, but doesn't in Czech Republic where communists were so successful in changing the concensus in regards to God?
A few notes about various conventional scientific methods of achieving concensus, just for kicks:
Proof by Obviousness: "The proof is so clear that it need not be mentioned."
Proof by General Agreement: "All in Favor?..."
Proof by Imagination: "Well, We'll pretend its true."
Proof by Convenience: "It would be very nice if it were true, so ..."
Proof by Necessity: "It had better be true or the whole structure of mathematics would crumble to the ground."
Proof by Plausibility: "It sounds good so it must be true."
Proof by Intimidation: "Don't be stupid, of course it's true."
Proof by Lack of Sufficient Time: "Because of the time constraint, I'll leave the proof to you."
Proof by Postponement: "The proof for this is so long and arduous, so it is given in the appendix."
Proof by Accident: "Hey, what have we here?"
Proof by Insignificance: "Who really cares anyway?"
Proof by Mumbo-Jumbo: " For any epsilon> 0 there exists a corresponding delta > 0 s.t. f(x)-L < epsilon whenever x-a < delta"
Proof by Profanity: (example omitted)
Proof by Definition: "We'll define it to be true."
Proof by Tautology: "It's true because it's true."
Proof by Plagiarism: "As we see on page 238 ..."
Proof by Lost Reference: "I know I saw this somewhere ..."
Proof by Calculus: "This proof requires calculus, so we'll skip it."
Proof by Terror: When intimidation fails ...
Proof by Lack of Interest: "Does anyone really want to see this?"
Proof by Illegibility: " ¥ ª Ð Þ þæ"
Proof by Logic: "If it is on the problem sheet, then it must be true."
Proof by Majority Rule: Only to be used if General Agreement is impossible.
Proof by Clever Variable Choice: "Let A be the number such that this proof works."
Proof by Tessellation: "This proof is just the same as the last."
Proof by Divine Word: "And the Lord said, 'Let it be true,' and it came to pass."
Proof by Stubbornness: "I don't care what you say! It is true!"
Proof by Simplification: "This proof reduces to the statement, 1 + 1 = 2."
Proof by Hasty Generalization: "Well, it works for 17, so it works for all reals."
Proof by Deception: "Now everyone turn their backs ..."
Proof by Supplication: "Oh please, let it be true."
Proof by Poor Analogy: "Well, it's just like ..."
Proof by Avoidance: Limit of Proof by Postponement as it approaches infinity.
Proof by Design: "If it's not true in today's math, invent a new system in which it is."
Proof by Intuition: "I just have this gut feeling ..."
Proof by Authority: "Well, Bill Gates says it's true, so it must be."
Proof by Vigorous Assertion: "And I REALLY MEAN THAT!"
Proof by A.F.K.T. Theorem: "Any Fool Knows That!"
Proof by vigorous handwaving: Works well in a classroom.
Proof by seduction: "Convince yourself that this is true!"
Proof by accumulated evidence: "Long and diligent search has not revealed a counterexample."
Proof by Divine Intervention: "Then a miracle occurs ...