The map's architecture

[Prelauncher]

The only thing that bothers me is Daniels actions before the player gets control of him (before the game actually starts). It is evident that he takes the Damascus Rose potion to forget his memory in an area towards the end of the game (due to the purple/pink trail on the floor/journal entries that trail all the way to the inner sanctum, which I assume Alexander locks himself in for the ritual). If this were the case, then he intentionally re locks all doors and un-solves all puzzles between there and the intro hall where we find him. Its the only logical explanation I can think of.

Tl;dr - Scumbag Daniel makes the game harder.

Hang on...didn't he consume the potion in the room where he wrote the note to himself?