Suppose you listen to a radio station that usually plays contemporarymusic hits, but has a “listener request hour” for classic songs. At theend of the hour the DJ sighs that, “they don’t make songs like theyused too.” However, as the DJ did not play or recall all the othersongs that were produced around the time that the classic song wasproduced, how can one know that what the DJ says is true? Themusic that was made then may have been of similar quality as mostof the music that is produced now, with a few exceptions that are rememberedas “classics.” But since the DJ (thankfully) did not play allthe bad songs from the record and only remembered the requestedclassic, the DJ’s assessment of the past, where music seemed somuch better, could have been biased.
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