Wdym? I wrote this walkthrough while playing through the game again, so I'm 99% sure it works.
Or do you mean, how would you get the answer without reading this walkthrough? You need to read the signs next to the buildings and talk to all the NPCs for clues. More specifically (based on what the NPCs say):
1. Terrance hates fruit. (the signs next to each row of buildings are named after fruit, except the one on the top row)
2. Terrance used to be into eastern media, but he's recently into western media. (this gives you 2 locations/directions east and west or left and right.)
3. Terrance would move his office, but not the building he's in. (he's used to be into eastern media, so he's in the eastern-most building)
4. Terrance moved his office recently. (he's now into western media, so his office was moved to the western side of the building)
5. Terrance is obsessed with the number 14. (this is how many times you need to go left in said building)
6. When exploring buildings, it feels like you're travelling through the same room over and over, but you aren't. (just keep going even if it looks like you're not getting anywhere. I added this as a way to discourage brute-forcing the puzzle. Maybe a bit mean on my part)
Thanks for trying my game btw, sorry if this message came across as a bit stern. Just wanted to be thorough.