Mark Twain is the authorship debate's top poster boy. Famous, funny and universally well-regarded, possibly even the author of the semi-mythical Great American Novel.
Twain did indeed collect a list of authorship shibboleths, though none referring to De Vere, and wrote the piece quoted below in conclusion. Before reading that, however, you are invited to look at some of Twain's scientific work in his description of the geological development of the River Mississippi. I'm sure we should always take anything written under the name Samuel Langhorne Clemens at face value.
However, anyone taking the work of Mark Twain as gospel is going to come a-cropper. Big Time.
Twain on Mississippian geology:
In the space of one hundred and seventy-six years the Lower Mississippi has shortened itself two hundred and forty-two miles. That is an average of a trifle over one mile and a third per year. Therefore, any calm person, who is not blind or idiotic, can see that in the Old Oolitic Silurian Period, just a million years ago next November, the Lower Mississippi River was upwards of one million three hundred thousand miles long, and stuck out over the Gulf of Mexico like a fishing-rod. And by the same token any person can see that seven hundred and forty-two years from now the Lower Mississippi will be only a mile and three-quarters long, and Cairo and New Orleans will have joined their streets together, and be plodding comfortably along under a single mayor and a mutual board of aldermen. There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
Twain on the Shakespearean authorship question:
I have never let my schooling get in the way of my education.
Am I trying to convince anybody that Shakespeare did not write Shakespeare’s Works? Ah, now, what do you take me for? Would I be so soft as that, after having known the human race familiarly for nearly seventy-four years? It would grieve me to know that any one could think so injuriously of me, so uncomplimentarily, so unadmiringly of me. No, no, I am aware that when even the brightest mind in our world has been trained up from childhood in a superstition of any kind, it will never be possible for that mind, in its maturity, to examine sincerely, dispassionately, and conscientiously any evidence or any circumstance which shall seem to cast a doubt upon the validity of that superstition. I doubt if I could do it myself. We always get second hand our notions about systems of government; and high tariff and low tariff; and prohibition and anti-prohibition; and the holiness of peace and the glories of war; and codes of honor and codes of morals; and approval of the duel and disapproval of it; and our beliefs concerning the nature of cats; and our ideas as to whether the murder of helpless wild animals is base or is heroic; and our preferences in the matter of religious and political parties; and our acceptance or rejection of the Shakespeares….
We are the reasoning race, and when we find a vague file of chipmunk-tracks stringing through the dust of Stratford village, we know by our reasoning powers that Hercules has been along there. I feel that our fetish is safe for three centuries yet. The bust, too – there in the Stratford Church. The precious bust, the priceless bust, the calm bust, the serene bust, the emotionless bust, with the dandy mustache, and the putty face, unseamed of care – that face which has looked passionlessly down upon the awed pilgrim for a hundred and fifty years and will still look down upon the awed pilgrim three hundred more, with the deep, deep, deep, subtle, subtle, subtle, expression of a bladder….
Shakespeare HASN’T ANY HISTORY TO RECORD. There is no way of getting around that deadly fact. And no sane way has yet been discovered to getting around its formidable significance. Its quite plain significance… is, that Shakespeare had no prominence while he lived, and none until he had been dead two or three generations. The Plays enjoyed high fame from the beginning; and if he wrote them it seems a pity the world did not find it out. He ought to have explained that he was the author, and not merely a nom de plume for another man to hide behind. If he had been less intemperately solicitous about his bones, and more solicitous about his Works, it would have been better for his good name, and a kindness to us. The bones were not important. They will moulder away, they will turn to dust, but the Works will endure until the last sun goes down.”
The last two sentences are what Twain really wants to say about Shakespeare.