Kaj Birket-Smith (20 January 1893 – 28 October 1977) was a Danish philologist and anthropologist. He specialized in studying the habits and language of the Inuit and Eyak. He was a member of Knud Rasmussen's 1921 Thule expedition. In 1940, he became director of the Ethnographic Department of the National Museum of Denmark.
Can we infer the following?
Kaj Birket-Smith could not be scene without his travel hat.

OPT:
[1]. Yes.
[2]. It's impossible to say.
[3]. No.
The answer is:
[2].