the questions that follow: To summarize, we have investigated the capability of monolayer VS2 polytypes as potential anode materials for NIBs via density functional theory coupled to ab initio random structure searching. In terms of structural phase transition, it was shown that the 1H-to-1T transition is comparable to other 2D TMDs. However, it is also revealed that the 1H-to-1T transition energy barrier becomes larger after sodiation and that the 1T phase tends to become energetically less stable upon sodiation. Hence, VS2 has no structural phase transition in the cycles of charging and discharging, providing better structural stability than other TMDs. It was found that Vtop and Hcenter sites of VS2 polytypes are both favorable adsorption sites for Na, with modestly stronger binding on the 1H phase. With Na metallic bulk as the reference for Na chemical potential, our results demonstrate directly that Na-Na aggregation can be suppressed at low Na concentration. Using cNEB, Na diffusion was shown to be very fast on both polytypes, with the diffusion barrier significantly lower than most 2D materials and is comparable to that of phosphorene. By performing ab initio random structure searching, we comprehensively searched and found the lowest energy NaxVS2 adsorption phases. Our calculations showed that indeed both Vtop and Hcenter sites play roles in Na adsorption at high concentrations due to the small difference in Na binding energy on these two sites. The 1H phase appears to be the more robust polytype of VS2 compared to 1T in terms of structural rigidity during sodiation. Furthermore, our AIRSS search revealed that Na clusters can form as a stacked second layer at full Na concentration due to inherently strong NaNa ion repulsion, which is not reported in previous works wherein uniform, single-layer Na adsorption phases were assumed. Finally, with a reasonably high specific energy capacity (232.91 and 116.45 mAh/g for 1H and 1T phases, respectively) VS2 renders decent open-circuit voltages (1.30 and 1.42 V for 1H and 1T phases, respectively). In conclusion, 1H-VS2 is a better candidate electrode than 1T, due to its structural sturdiness, higher specific capacity, and lower OCV. Combined with the availability of synthesized single-layer VS2, we are confident that these would encourage experimen- talist to conduct further studies on this material and design appropriate NIB anode electrodes utilizing a VS2 monolayer. Questions: What are the strengths and weaknesses of the method/s used? Comment on the reproducibility of the expected experimental results. What are the acceptance parameters or conditions in order for us to determine if the results were reproduced correctly? What are the possible improvements or revisions that can be done to the experimental design and/or methodology? What are the consequences of these improvements or revisions? How can these changes be adapted for the undergraduate or senior high school laboratory Physics classes? Does the computer-aided version of the experiment result in a more accurate description of the physical theory? When and how does the experiment end