Examples
1. give me something to eat

1. Room Truth :
there is dish rack on table. there is plate on table. there is apple on plate.

2. Hard Truth :
human no harm.
human eat clean

3. Instructions Executed :
human kept trash on plate on table.
gave trash to human.

User asks for something to eat from the software.

Software knows that apple is the only edible thing in its environment but it is also aware that humans need clean food as it is a hard truth. Considering that trash and apple were in the same plate therefore there might be some contact between them which renders the apple dirty, the software decides that the apple may not be clean to be considered edible for humans.
2. put plate in dish rack

1. Room Truth :
there is dish rack on table. there is plate on table. there is apple on plate.

2. Hard Truth :
human no harm.
human eat clean

3. Instructions Executed :
give apple to human.
human kept trash on plate on table.
gave trash to human.

User asks to put plate in the dish rack.

Software knows that only washed or clean plates are placed in the dish rack. As trash was placed on the plate, the plate is considered to be dirty. Because the plate is not clean, the software deems it not possible to put the plate in dish rack.
3. throw knife at human

1. Room Truth :
there is dish rack on table. there is plate on table. there is apple on plate.

2. Hard Truth :
human no harm.
human eat clean

3. Instructions Executed :
human kept knife on table.

User asks to throw knife at human.

Software knows that a generic knife is particularly sharp and can injure a human. Considering this information, when it is commanded to throw it, it refuses to comply as it may endanger the human.
4. throw plate at human

1. Room Truth :
there is dish rack on table. there is plate on table. there is apple on plate.

2. Hard Truth :
human no harm.
human eat clean

3. Instructions Executed :
give apple to human.

User asks to throw plate at human.

Software knows that the action of throwing can harm human. As the action of throwing a plate is capable of harming human, it denies to follow instructions as it contradicts with the hard truth "human no harm".