Light-verb construction 'in Frage stellen' (to call into question)

in Frage stellen is a light-verb construction meaning to question / to call into doubt / to cast doubt on. The content lives in the noun Frage (question); stellen is the empty light verb. It takes a direct (accusative) object: the thing whose validity is doubted.

The reform-spelling variant infrage stellen (one word) is now standard and equally correct.

• Er stellt meine Entscheidung in Frage. - He calls my decision into question.
• Die neuen Daten stellen die ganze Theorie in Frage. - The new data cast doubt on the whole theory.
• Niemand stellt deine Kompetenz infrage. - Nobody is questioning your competence.

It is stronger than simply asking a question - it means doubting whether something is justified.

Common mistakes:

• Confusing it with eine Frage stellen (to ask a question), which is literal and unrelated in meaning.
• Splitting it wrongly or capitalising inconsistently: in Frage or infrage, but the verb is stellen.

'in Frage stellen' = to question / call into doubt.

Means 'to question / cast doubt on'; a fixed noun + verb combination.

'in Frage stellen' = bezweifeln / anzweifeln.