A dictionary of Confusable Phrases: More Than 10,000 Idioms and Collocations

it is not a question of something • there is no
question of something
it is not a question of something —is used to tell that smth.
is not a factor: It is not a question of education. Even highly
educated people are biased against females.
there is no question of something —there is no doubt about
smth.: The coin has suffered from corrosion, yet there is no
question of its antiquity or its authenticity.
it is not true • it is untrue
it is not true —
1
. it is false or erroneous: It is not true that
the future of British bird life is one of depleted numbers. 2.
(coll.) it is amazing; it is incredible: You may be only thirty-
six but you’re so dead old-fashioned it isn’t true.
it is untrue — = it is not true 
1
: It is untrue to say that red
wine should be paired with red meat and white wine with
fish.
Note: 
Neither expression correlates in meaning with the phrase
out of true
— not correctly aligned or adjusted: I got on my bike
and tried to get going again but … my front wheel was out
of true.
it is said that • it says that
it is said that—it is commonly believed that: Indeed, it is
said that their use of red ochre on their bodies is what
prompted the term, Red Indian.
it says that—is used to introduce a reference or quotation:
In Genesis, it says that it is not good for a man to be alone;
but sometimes it is a great relief.
it takes two to make a bargain • it takes two to
tango
it takes two to make a bargain —both parties must agree in
order for a deal to be successful: “We decided you should make
dinner tonight, right?” “No, we didn’t decide that; you decided
that. It takes two to make a bargain.”
it takes two to tango —(also: it takes two to make a quarrel)
both parties should share responsibility: All nations that go
to war have some guilt. It always takes two to tango, you know.
See also: that makes two of us / two can play at this game.