The phrase "flexible mind" is correct and usable in written English.
You can use this phrase to refer to a person who is open-minded, and not limited by fixed ideas or beliefs. For example, "As a teacher, I encourage my students to develop a flexible mind so they can learn new things and form their own opinions."
His record suggests a rich and flexible mind.
Only Nadia, with her flexible mind and disorderly life, thinks she's got a chance.
Lebed had a shrewd and flexible mind, which proved extremely useful to Yeltsin.
One company advises women to feed their babies nest fragments dissolved in milk to "give the infant a flexible mind".
He combined an iron will and ability to drive himself and his men to the utmost with a supple and flexible mind; he knew when to draw back and change his policy, though he did this reluctantly.
To say Gandhi would look at villages today the same way as he looked at villages 100 years ago is to do no justice to Gandhi, who had an extraordinarily flexible mind, a pragmatic mind.
General Palumbo said Special Operations soldiers "have the flexible mind-set ingrained in you," which is valuable in solving problems within a complex military service or government bureaucracy.
But, Thiel says, Andreessen is well positioned, because of his broad knowledge and flexible mind-set, to respond to incremental changes in an array of fields.
Employers often say that what they want are articulate recruits, with good self awareness, good thinking skills, flexible minds and the ability to make good decision.
It was very exciting to be suddenly writing for readers who have such flexible minds and who can consider all kinds of possibilities.
Ed Fidoe, who himself had gone to a small all-through school, had worked as a consultant for many education organisations, and was convinced that we needed a revolution in the curriculum and pedagogy of schools if students were to come out with the flexible minds needed to succeed.
