The phrase "important and significant" is grammatically correct and commonly used in written English.
It is typically used to emphasize the importance and relevance of something. Example: "In order to make important and significant changes in society, we must first address the root causes of inequality."
There are important and significant exceptions, however.
The political conclusions to emerge out of the weekend conference are an even more important and significant development.
"He wants to meet with them and share with them this important and significant moment, a bittersweet moment," Carney said.
Commenting on their appointments, the PCC's chair, Baroness (Peta) Buscombe, said: "These are important and significant appointments..
"I'm sometimes not sure if OTs themselves understand how important and significant their contribution is," Hollins says.
"This is important and significant," said a high-ranking official with the United Nations peacekeeping force in southern Lebanon.
Cameron said he understood McKinnon was accused of a "very important and significant crime" but said he hoped "a way through" could be found.
"It only happens to be one of the most important and significant developments in international transport... How many experts were there on international high speed rail?
"The landmarks commission has reviewed all the structures in Coney Island and has selected the most important and significant structures to make landmarks," she said.
These attempts at censorship come at a time when special forces are playing, and are likely to continue to play, an increasingly important and significant role in conflicts.
"In the very difficult economic circumstances we are in, we will never maintain support for Britain's important and significant development programme unless the money is well spent".
