What can be asserted without evidence can be dismissed without evidence.
-- Christopher Hitchens
Accuracy was sacrificed for a pleasant parallel construction. Anything can be so asserted.
And, without supporting evidence, such assertions demonstrate nothing.
The mere fact that an assertion has been made is, in fact, evidence. For example, I will now flip a coin five times, and assert that the outcome was THHTT. I will not provide any evidence other than that assertion, but that is sufficient to conclude that your estimate of the probability that it’s true should be higher than 1/2^5. Most assertions don’t come with evidence provided unless you go looking for it. If nothing else, most assertions have to be unsupported because they’re evidence for other things and the process has to bottom out somewhere.
Now, as a matter of policy we should encourage people to provide more evidence for their assertions wherever possible, but that is entirely separate from the questions of what is evidence, what evidence is needed, and what is demonstrated by an assertion having been made.
The mere fact that an assertion has been made is, in fact, evidence.
Well the evidence here isn’t really “the fact that it has been asserted” but “the fact that it has been asserted in a context where truthfulness and authority are usually assumed”. The assertion itself doesn’t carry the weight. If we’re playing poker and in the middle of a big hand I tell you “I have the best hand possible, you should fold.” that isn’t evidence of anything since it has been asserted in a context where assumptions about truthfulness have been flung out the window.
that is sufficient to conclude that your estimate of the probability that it’s true should be higher than 1/2^5.
Or it’s sufficient to conclude that one’s estimate should be less than 1/2^5. Without providing additional evidence (such as “I saw the THHTT outcome”) your claim is rather dubious and—in the realm of humans—this probably is a good indicator that you are lying or are crazy. I’m not sure how one should update your posteriors.
Suppose I tell you that my password is D!h98+3(dkE4. Do you conclude that since I don’t want you to know my password, I must be trying to mislead you as to what my password is, and so the probability that this is my password is actually less than 1/95^12?
If I assert that the outcome as THHTT, either I’m lying or I’m not lying, and there’s little evidence either way. What little evidence there is probably doesn’t push my probability of telling the truth below 3%, and surely the strength of the evidence has little, if anything, to do with the prior probability of the coin showing THHTT.
Do you conclude that since I don’t want you to know my password, I must be trying to mislead you as to what my password is, and so the probability that this is my password is actually less than 1/95^12?
Good point. Thanks for batting down my idiocy here, much obliged =D
The mere fact that an assertion has been made is, in fact, evidence. For example, I will now flip a coin five times, and assert that the outcome was THHTT. I will not provide any evidence other than that assertion, but that is sufficient to conclude that your estimate of the probability that it’s true should be higher than 1/2^5. Most assertions don’t come with evidence provided unless you go looking for it. If nothing else, most assertions have to be unsupported because they’re evidence for other things and the process has to bottom out somewhere.
Now, as a matter of policy we should encourage people to provide more evidence for their assertions wherever possible, but that is entirely separate from the questions of what is evidence, what evidence is needed, and what is demonstrated by an assertion having been made.
Well the evidence here isn’t really “the fact that it has been asserted” but “the fact that it has been asserted in a context where truthfulness and authority are usually assumed”. The assertion itself doesn’t carry the weight. If we’re playing poker and in the middle of a big hand I tell you “I have the best hand possible, you should fold.” that isn’t evidence of anything since it has been asserted in a context where assumptions about truthfulness have been flung out the window.
Or it’s sufficient to conclude that one’s estimate should be less than 1/2^5. Without providing additional evidence (such as “I saw the THHTT outcome”) your claim is rather dubious and—in the realm of humans—this probably is a good indicator that you are lying or are crazy. I’m not sure how one should update your posteriors.
Suppose I tell you that my password is D!h98+3(dkE4. Do you conclude that since I don’t want you to know my password, I must be trying to mislead you as to what my password is, and so the probability that this is my password is actually less than 1/95^12?
If I assert that the outcome as THHTT, either I’m lying or I’m not lying, and there’s little evidence either way. What little evidence there is probably doesn’t push my probability of telling the truth below 3%, and surely the strength of the evidence has little, if anything, to do with the prior probability of the coin showing THHTT.
Good point. Thanks for batting down my idiocy here, much obliged =D