During the brainstorming session, she shared several idées that changed the project's direction.

Despite many suggestions, his idée fixe about launching the product in June wouldn't allow him to consider a later date.

The author's idée mère—that all stories are interconnected—guided the structure of the novel.

Her idées fixes about perfection made every collaboration difficult.

His idée fixe about the conspiracy made him dismiss every counterargument.

In the brainstorming session, she highlighted three idées mères that would shape the entire project.

The scientist challenged the idée reçue that older people cannot learn new technologies.