Footnotes to Plato from the foothills of the Superstition Mountains

The Ersatz Eternity of the Past: Denied by Lukasiewicz!

The Pole denies the actuality of the past and in consequence thereof the ersatz eternity or accidental necessity (necessitas per accidens) of the past.

Quasi-literary Preamble:

What has been, though it needn't have been, always will have been.  What time has mothered, no future time can destroy.   What you were and that you were stand forever inscribed in the roster of being whether or not anyone  ever reads the record.  What you have done, good or bad, and what you have left undone, good or bad, cannot be erased by the passage of time. You will die, but your having lived will never die. This is so even if you and your works and days are utterly forgotten. An actual past buried in oblivion remains an actual past. The erasure of memories and memorials is not the erasure of their quondam objects. The being of what was does not depend on their being-known; it does not rest on the spotty memories, flickering and fallible, of fragile mortals or their transient monuments or recording devices.

But how paltry the ersatz eternity of time's progeny!  Time has made you and will unmake you.  In compensation, she allows your having been to rise above the reach of the flux.  Thanks a lot, bitch!  You are one mater dolorosa whose consolation is as petty as your penance is hard.

………………………….

I posted a precursor of the above on 10 March 2010.  It elicited an astute comment from Alan Rhoda.  He wrote:

You here express the tense-logical idea that p –>FPp, that if something is the case, then it will thereafter always be the case that it has been the case. In Latin, facta infecta fieri non possunt. [The done cannot be undone.]

Believe it not, this has been denied by the famous Polish logician Lukasiewicz, no less. He seems to have accepted a version of presentism according to which (1) all (contingent) truths depend for their truth on what presently exists, and (2) what presently exists need not include anything that suffices to pick out a unique prior sequence of events as "the" actual past. Accordingly, truths about the past may cease to be true as the passage of time obliterates the traces of past events. Lukasiewicz apparently found this a comforting thought:

"There are hard moments of suffering and still harder ones of guilt in everyone’s life. We should be glad to be able to erase them not only from our memory but also from existence. We may believe that when all the effects of those fateful moments are exhausted, even should that happen only after our death, then their causes too will be effaced from the world of actuality and pass into the realm of possibility. Time calms our cares and brings us forgiveness." (Jan Lukasiewicz, "On Determinism" in  Selected Works, ed. L. Borkowski, North-Holland, Amsterdam, 1970, p.128.)

Lukasiewicz  JanThat is  to my mind an amazing passage from Lukasiewicz both because of his rejection of the tense-logical principle, p –>FPp,  and because of the consolation he derives from its rejection.

I myself find it very hard to believe that there wasn't an actual unique past. I find it impossible to believe that, with the passage of enough time, past events will somehow go from being actual to being merely possible. It seems obvious to me, a plain datum, that there is an important difference between a past event such as Kierkegaard's engagement to Regine Olsen, which actually occurred, and a merely possible (past) event such as his marriage to her which did not occur, but could have  occurred, where 'could have' is to be taken ontically and not epistemically. Now that datum tells against presentism — unless you bring God into the picture which is what Rhoda does.  For if the present alone exists, then the wholly past does not exist, which implies that there is no difference between a merely possible past event and an actual past event.


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3 responses to “The Ersatz Eternity of the Past: Denied by Lukasiewicz!”

  1. David Brightly Avatar

    Good Morning, Bill. It’s a couple of years since we last discussed this topic. This is what I would now like to propose. Let’s return to our old friend Tom the tomato. It’s Monday, and Tom is green. Tom’s extant greenness, say, makes it true to say today, ‘Tom is green’. If ‘Tom is green’ is true today then ‘Tom was green’ will be true tomorrow and subsequently, even if by then Tom is red or eaten. This is the p → FPp principle in action. Given that we live in a temporal world, it is telling us how to use the word ‘was’. The connection between ‘is’ and ‘was’ is analytic. The truth of ‘Tom was green’ uttered tomorrow will not depend upon the state of the world tomorrow. Nor will it depend on the duration of the interval between today and tomorrow: ‘Tom is green’ licenses ‘Tom was green’ immediately.
    I think the above makes sense within the understanding of tensed language shared between the presentist and his opponents. If tomorrow the presentist will be unable to supply an extant truthmaker for ‘Tom was green’, then so be it. He doesn’t need one. The way an ‘is’ sentence turns into a ‘was’ sentence is part of our common understanding of time.

  2. BV Avatar
    BV

    Hi, David. Thanks for the comment.
    You say that ‘Tom is green’ is made true by something external to that sentence, namely, Tom’s extant greenness. I agree. Generalizing, you seem to to be committed to saying that every contingent, present-tensed truth needs an extra-linguistic truth-maker. You also see to be committed to accepting a distinction between truth-bearers, such as declarative sentences, and truth-makers which are not sentential (or propositional) in nature. For example, ‘Milo exists’ is a sentence; but its truth-maker, the man Milo, is not a sentence. If you are OK with these commitments, we are in agreement.
    But you don’t think that past-tensed true sentences such as ‘JFK was assassinated’ which are true at present need truth-makers. That is: nothing non-sentential, nothing extra-linguistic, is needed now to make it true now that JFK was assassinated in late November, 1963. (The causal effects existing at present of JFK’s having lived play no truth-making role.) I take it that for you what makes the JFK sentence true now is the wholly intra-linguistic, analytic connection between ‘is’ (present-tense) and ‘was’ (past-tense).
    But if presentism is true, and the present alone exists, then the wholly past is nothing, and ‘JFK was assassinated,’ which is contingently true now, is not about anything — which I find counterintuitive.
    More later. At present I am bogged down with plumbing and other problems of a mundane sort. Would you say that ‘Sir Thomas Crapper’ now refers to nothing?

  3. David Brightly Avatar

    Morning, Bill.
    I agree with your first para.
    Ah yes, Thomas Crapper, eminent Victorian. A ceramicist with a wide popular following. Several royal warrants but never knighted, I fear. So I would not say that ‘Thomas Crapper’ now refers to nothing. The name refers to a man that once existed but now no longer does. Also, I’m inclined to avoid the attribution ‘is nothing’. It strikes me as ambiguous between ‘does not now exist’ and ‘is unreal’, as in imaginary or fictional.
    To clarify: the only requirements I am placing on the present for the sentence ‘JFK was assassinated’ to be true are (a) that JFK’s assassination occurred before the present, and (b) according to contemporary English, the sentence correctly expresses the occurrence of JFK’s assassination, particularly with regard to tense.

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