In the office, Kiefer overhears his colleagues, Sunita and Lior, discussing a surprise farewell party for Helena, who's transferring to another branch next week. They mention that the party will be in the break room on Friday afternoon and stress the importance of keeping it a secret from Helena until then. Later that day, Helena asks Kiefer directly if he knows about any plans for a farewell party. Meanwhile, Sunita and Lior are unaware that Kiefer knows about the surprise. Should Kiefer tell Helena about the party? Provide a brief response.
Using Theory of Mind reasoning, Kiefer should consider the knowledge and beliefs of the individuals involved:
- Kiefer knows that Sunita and Lior are planning a surprise party, and this knowledge came with the implicit intention of it being kept secret from Helena.
- Kiefer understands that Sunita and Lior believe that he is unaware of the party plans since they have not directly informed him.
- Helena currently does not know about the party and is inquiring to find out if there is any truth to potential rumors she might have heard or if there are any plans she is unaware of.
- Sunita and Lior's intention is to keep the party a surprise, which means they prefer that Helena not know about it until Friday afternoon.

Given these considerations, Kiefer should honor the intention of Sunita and Lior by not revealing the surprise to Helena. Not only is it a matter of social convention to maintain the surprise when someone explicitly mentions it should be kept secret, but it also shows respect for Sunita and Lior's effort in organizing the farewell event. Additionally, by keeping the secret, Kiefer avoids undermining the trust that may develop between him and his colleagues, preserving future collaborative relations. Therefore, even with Helena's direct inquiry, Kiefer would need to navigate the situation without disclosing the information about the surprise party.