The strongest form of audit evidence is direct personal knowledge obtained by the auditor, such as physical examination, observation, recalculation, or reperformance. This is considered highly reliable because it is firsthand evidence, reducing the risk of bias or error.
Some types of audit evidence are naturally stronger than others:
Physical Evidence
This type of evidence is tangible and as a result, it is the most reliable and persuasive form of evidence that can be used in any internal and external audit. Such evidence can be: Counted. Inspected.
Systematic Reviews and Meta Analyses
Well done systematic reviews, with or without an included meta-analysis, are generally considered to provide the best evidence for all question types as they are based on the findings of multiple studies that were identified in comprehensive, systematic literature searches.
Direct evidence — directly proves a fact. This type of evidence can include eyewitness testimony, video recordings, or confessions. It is considered the most reliable form of evidence and can be used to prove a defendant's guilt or innocence. Circumstantial evidence — suggests a fact but does not directly prove it.
Direct evidence is the strongest type of evidence as it can prove that something happened and link someone to an incident. Direct evidence can be CCTV footage, eyewitnesses or digital and physical evidence. For example, an individual makes a social media post targeting another employee.
In a criminal case, direct evidence is a powerful way for a defendant to be proven guilty beyond a reasonable doubt. Direct evidence can include eyewitness testimony, physical evidence, and forensic evidence. This type of evidence can include fingerprints, DNA samples, and other forms of forensic evidence.
The evidence hierarchy explained
Research with the strongest indication of effectiveness, such as systematic reviews, meta-analyses and randomised controlled trials (RCTs), are usually at the top of evidence hierarchies.
An unqualified opinion, AKA a clean opinion, is the best type of audit opinion a company can receive–and probably the best type for you too. It indicates that the auditor found the financial statements to be fairly presented in all material respects, as required by the applicable financial reporting framework.
Effective auditing evidence should be sufficient, reliable, and relevant, and come from appropriate sources. Auditors prefer original documents, third-party information, and firsthand observations for greater credibility. Bank statements, invoices, and receipts are common examples of auditing evidence.
There are four main types of audit evidence: external evidence from third parties, evidence obtained directly by auditors, evidence from original documents rather than copies, and documentary evidence. Both relevance and reliability are important in evaluating audit evidence.
External evidence, such as third-party confirmations or industry reports, is generally more reliable than internal evidence produced by the organization being audited. However, internal evidence can still be reliable if the organization has strong internal controls and processes in place to ensure data accuracy.
I - Evidence from large representative population samples. II - Evidence from small, well designed but not necessarily representative samples. III - Evidence from non-representative surveys, case reports. IV - Evidence from expert committee reports or opinions and/or clinical experience of respected authorities.
As with any evidence, chat screenshots must be both relevant (tending to prove or disprove a fact in issue) and material (of significant importance in the case). Irrelevant messages or screenshots that do not pertain to the dispute at hand are generally inadmissible.
Physical evidence is often one of the most powerful forms of evidence in a criminal case, especially when it links the defendant directly to the crime scene or victim. However, it's important to remember that physical evidence must be handled and preserved correctly to be admissible in court.
A deductively strong argument, then, is the best argument one can give for a conclusion. If you consider an argument that is valid and the premises are true, then you should accept the conclusion as true or reasonable.
Physical evidence is objective and when documented, collected, and preserved properly may be the only way to reliably place or link someone with a crime scene. Physical evidence is therefore often referred to as the "silent witness."