Somebody said that in an efficient market prices are within a factor of two of correct. People are so caught up in the fact that we have prices of everything to fractional pennies every microsecond, that they can't conceive of just how much is false precision.
Can't you begin by admitting that there is some uncertainty, that every price implicitly has some +/- amount associated? And next, consider that when an entire company is purchased, it usually costs a lot more than the immediately prior trading price, showing that separately from uncertainty, there is a big range between different shareholders?
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