God has given each of us a spirit capable of discerning truth from error, but evaluating candidate truth is neither easy nor fast. Mormon said, “Search diligently in the light of Christ that ye may know good from evil.” (Moroni 7:19) Truth seeking is not a passive activity.
Paul wrote: “Prove all things; hold fast that which is good.” (1 Thessalonians 5:21) It is difficult to give a fair shake to “all things,” as this would require all of your time and a great deal of your money. There are far more claims to truth than actual truth, like mining flecks of gold from a mountain of dross. Extracting higher order truth requires testing. If you want to maximize your intake of new truth, you have to become efficient at the process of testing it.
The ability to investigate the value of putative truth is perhaps the most critical skill you can possess, as it will determine how much truth you can obtain given your limited time and exposure.