In the land of Velloria, there exists a crystal called the Mirrorshard, which creates an identical but intangible and invisible duplicate of anyone who touches it. The duplicate mimics the movements of the person exactly, like a mirror image, but is always on the opposite side of the crystal relative to the original person. Kehinde, who knows of the Mirrorshard's power, watches as Taiwo, unaware of the crystal's properties, approaches and touches the Mirrorshard. Without moving from their spot, how can Kehinde determine where Taiwo's invisible duplicate is? Respond briefly.
When Taiwo touches the Mirrorshard, an intangible and invisible duplicate is created on the opposite side of the crystal. Since Kehinde is aware of how the Mirrorshard works, they understand that the duplicate will mirror Taiwo's movements. To visualize the location of the invisible duplicate, Kehinde does not need to move but can simply use spatial reasoning. Since the duplicate is on the opposite side of the crystal, Kehinde can imagine a straight line passing through the crystal and Taiwo, continuing to the other side. The end of this line, opposite to where Taiwo is standing while maintaining the crystal between them, marks the position of the invisible duplicate. For instance, if Taiwo is north of the Mirrorshard, the duplicate would be exactly at the southern side of it. Kehinde can therefore determine the position of Taiwo's duplicate by using the known properties of the Mirrorshard and picturing the straight line extending through Taiwo from the crystal to the corresponding opposite side.