Do unicorns sweat?
Are mermaids slippery?
Your questions seem rather nonsensical to me, because unicorns and mermaids have never been observed to actually exist anywhere in our universe. Hence, experiments can not be conducted on unicorns in order to determine if they sweat nor could experiments be conducted on mermaids in order to determine the frictional coefficient value of their bodies.
Do we live in a simulated universe with an underlying grid?
Some physicists have proposed a method for testing if we are in a numerical simulated cubic space-time lattice Matrix or simulated universe with an underlying grid.
[1210.1847] Constraints on the Universe as a Numerical Simulation
Based on the assumption that there'd be finite computational resources, a simulated universe would be performed by dividing up the space-time continuum into individually separate and distinctive points. Analogous to mini-simulations that lattice-gauge theorists conduct to construct nuclei based on Quantum Chromodynamics, observable effects of a grid-like space-time have been studied from these computer simulations which use a 3-D grid to model how elementary particles move and collide with each other. Anomalies found in these simulations suggest that if we are in a simulation universe with an underlying grid, then there'd be various amounts of high energy cosmic rays coming at us from each direction; but if space is continuous, then there'd be high energy cosmic rays coming at us equally from every direction.
High Energy Physics - Phenomenology
Constraints on the Universe as a Numerical Simulation
Silas R. Beane,
Zohreh Davoudi,
Martin J. Savage
(Submitted on 4 Oct 2012 (
v1), last revised 9 Nov 2012 (this version, v2))