Was Shakespeare Shakespeare?

I’m new to this controversy, but was Shakespeare Shakespeare?

George Grant says no, in his Christian Almanac: A Book Of Days Celebrating History’s Most Significant People & Events. Today is the Shakespear’s/Shakspar’s birthday and Grant says,

Three is no evidence that Shakspar was ever actually literate–there are no extant manuscripts of his writing and the only evidence we have of his hand are two barely legible “X-marks-the-spot” signatures. He had no formal education, owned no books, never traveled abroad as far as we know, and never claimed authorship of the works attributed to him. His parents were illiterate, his wife was illiterate, and his children were illiterate–hardly what you might expect from the undisputed “single greatest author of English prose.”

The same was poted today on his blog. Read it here on Grantian Florilegium.

If you wish to delve in further, let me know how it goes in the pool of controversy.