Choosing new exhibitors and last-minute replacements — there are only about 40 this year — is hardly an exact science, Dullinger said, and it's definitely not on a first-come, first-served basis.

Source: https://m.startribune.com/how-do-vendors-land-a-booth-at-the-minnesota-state-fair/600300229/

It's whatever the character might like, there's no exact science for acting.

Source: https://collider.com/the-starling-girl-lewis-pullman-eliza-scanlen-eliza-scanlen-interview/

There is no exact science to this part, please just check it every now and then until done.

Source: https://cyprus-mail.com/2023/09/09/king-of-the-deep/