The phrase "spontaneously generate" is correct and can be used in written English.
It means to generate or create something without any conscious effort or intention. Example: The ideas for his new novel seemed to spontaneously generate in his mind as he walked through the park. In this sentence, the phrase "spontaneously generate" suggests that the ideas came to the author without any deliberate thinking or planning.
While both supported the idea of spontaneous generation, Italian abbot and physiologist Lazzaro Spallanzani maintained that life could never spontaneously generate from dead matter.
His ability to spontaneously generate puns is unsurpassed.
Eventually, neurons in the cerebral hemispheres continuously and spontaneously generate impulses.
Will addressing the God crisis, perhaps with the pastoral sensitivity Benedict demonstrated on his visit, spontaneously generate responses to the church crisis?
It's just that Edwards has gone all-in on hoping drama would spontaneously generate from a wash of lovely but inert ambience.
Which is going to make our job all that much harder as we the people of New Jersey spontaneously generate a statewide honor code to try to shut off our sewer pipe of dishonesty and corruption.
As if deformity were spontaneously generated.
He thought that worms were spontaneously generated from wet soil, that earthquakes were the result of winds caught in underground caverns, that the sun circled the earth.
The human mind is incredibly averse to uncertainty and ambiguity; from an early age, we respond to uncertainty or lack of clarity by spontaneously generating plausible explanations.
The libertarian imagination, amply furnished with metaphors of invisible hands and spontaneously generated order, is thrilled by such technological empowerment.
Alchemy was once broadly dismissed as a form of primitive, pre-scientific belief -- like Aristotle's conviction that lice were spontaneously generated from flesh, or claims that human life was created in the forms of homunculi.
