The urge to switch from subjunctive to indicative is always a powerful one.

From Shakespeare The World as Stage by Bill Bryson. Page 15.

With so little to go on in the way of hard facts, students of Shakespeare’s life are left with essentially three possibilities: to pick minutely over legal documents as the Wallaces did; to speculate (“every Shakespeare biography is 5 percent fact and 95 percent conjecture,” one Shakespeare scholar told me, possibly in jest); or to persuade themselves that they know more than they actually do. Even the most careful biographers sometimes take a supposition—that Shakespeare was Catholic or happily married or fond of the countryside or kindly disposed toward animals—and convert it within a page or two to something like a certainty. The urge to switch from subjunctive to indicative is, to paraphrase Alastair Fowler, always a powerful one.