is that a fact?

Idioms  

1. Also, is that so? Phrases indicating that one is following what another person is saying. These expressions, which require no reply, can be used either straightforwardly, as in You mean you've flown to Paris three times just this month? Is that a fact? or sarcastically, expressing disbelief or contempt, as in Just wait, I'll be promoted over you before the year is out.—Oh yeah, is that so? [Late 1800s]

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Example Sentences

SG: I was going to say, is that a fact?

From Seattle Times

“Is that a fact?” says Uncle Al.

From Literature

“Is that a fact,” says Uncle Al.

From Literature

“I saw that Senator Murphy met with the Iranians, is that a fact?”

From Fox News

If you tell me that once it was seafloor ooze and that through some incredible sustained process it was thrust deep into the earth, baked and squeezed for millions of years, then popped back to the surface, which is what accounts for its magnificent striations, its shiny vitreous crystals, and flaky biotate mica, I will say, “Goodness!” and “Is that a fact!” but I can’t pretend that anything actual will be going on behind my game expression.

From Literature