It has to do with how the images are generated. Getting the right number of fingers is tough because you need to be able to count the number of fingers and generate a new image if it's not right.
en.wikipedia.org
The stories told of Diogenes illustrate the logical consistency of his character. He inured himself to the weather by living in a clay wine jar
[5][19] belonging to the temple of
Cybele.
[20] He destroyed the single wooden bowl he possessed on seeing a peasant boy drink from the hollow of his hands. He then exclaimed: "Fool that I am, to have been carrying superfluous baggage all this time!".
[21][22] It was contrary to Athenian customs to eat within the marketplace, and still he would eat there, for, as he explained when rebuked, it was during the time he was in the marketplace that he felt hungry. He used to stroll about in full daylight with a
lamp; when asked what he was doing, he would answer, "I am looking for a man."
[23] (Modern sources often say that Diogenes was looking for an "honest man", but in ancient sources he is simply "looking for a man" – "ἄνθρωπον ζητῶ".
[24] In his view, the unreasoning behavior of the people around him meant that they did not qualify as men.) Diogenes looked for a man but reputedly found nothing but rascals and scoundrels.
[25]