you never can tell
Also, you never know. Perhaps, possibly, one can't be certain, as in You never can tell, it might turn into a beautiful day, or You may yet win the lottery—you never know. The first term uses tell in the sense of “discern,” a usage dating from the late 1300s; the variant dates from the mid-1800s.
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The simple, awful truth is that free speech has never been particularly popular in America.
He looks like a man who should have had kids, but now never will.
It was followed by several told-you-so articles with titles like “Have No Illusion: Islam Is the Enemy.”
As far as I can tell, this magazine spent as much time making fun of French politicians as it did of Muslims or Islam.
In an email exchange a friend said many had repeated this same succinct review but they could never elaborate.‘Empire’ Review: Hip-Hop Musical Chairs with an Insane Soap Opera Twist|Judnick Mayard|January 8, 2015|DAILY BEAST
And to tell the truth, she couldn't help wishing he could see, so he could make the game livelier.The Tale of Grandfather Mole|Arthur Scott Bailey
Bessires was included because he would never win it at any later date, but his doglike devotion made him a priceless subordinate.Napoleon's Marshals|R. P. Dunn-Pattison
Ages back—let musty geologists tell us how long ago—'twas a lake, larger than the Lake of Geneva.
Each day she resolved, "To-morrow I will tell Felipe;" and when to-morrow came, she put it off again.Ramona|Helen Hunt Jackson
Now, it immediately occurred to Davy that he had never in his whole life had all the plums he wanted at any one time.Davy and The Goblin|Charles E. Carryl