Entities mentioned:
- Joe Biden: Self-preservation, Power, Legacy
- Bruce Reed: Loyalty, Professional pride, Duty
- House Oversight Committee: Justice, Control, Influence
- Anita Dunn: Loyalty, Professional pride, Self-preservation
- Donald Trump: Competitive spirit, Power, Influence
- Steve Ricchetti: Loyalty, Duty, Professional pride
- Mike Donilon: Loyalty, Duty, Professional pride
- Dr. Kevin O'Connor: Self-preservation, Professional pride, Duty
- Anthony Bernal: Self-preservation, Loyalty, Duty
- Annie Tomasini: Self-preservation, Loyalty, Duty

Article Assessment:
Credibility Score: 65/100
Bias Rating: 55/100 (Center)
Sentiment Score: 35/100
Authoritarianism Risk: 40/100 (Generally Democratic)

Bias Analysis:
The article presents a relatively balanced view, including perspectives from both sides. However, there's a slight lean towards emphasizing Republican actions and Democratic reluctance, which could be interpreted as a mild center-right bias.

Key metric: Political Stability

As a social scientist, I analyze that this investigation into former President Biden's cognitive abilities could significantly impact political stability in the United States. The probe by House Republicans suggests a deep partisan divide and potential delegitimization of a former administration. The involvement of high-ranking officials and their varying degrees of cooperation indicate the seriousness of the investigation. The invocation of the Fifth Amendment by some officials raises questions about potential legal implications. This investigation could influence public trust in political institutions and impact future elections, particularly if evidence of cognitive decline or concealment is found. The situation highlights the ongoing tension between political parties and the use of congressional oversight as a tool for political maneuvering.

Entities mentioned:
- Joe Biden: Legacy, Duty, Power
- Anita Dunn: Loyalty, Professional pride, Duty
- House Oversight Committee: Righteousness, Control, Influence
- Robert Hur: Duty, Justice, Professional pride
- Bruce Reed: Loyalty, Duty, Professional pride
- Steve Ricchetti: Loyalty, Duty, Professional pride
- Mike Donilon: Loyalty, Duty, Professional pride
- Dr. Kevin O'Connor: Professional pride, Self-preservation, Duty
- Anthony Bernal: Self-preservation, Loyalty, Duty
- Annie Tomasini: Self-preservation, Loyalty, Duty

Article Assessment:
Credibility Score: 70/100
Bias Rating: 55/100 (Center)
Sentiment Score: 45/100
Authoritarianism Risk: 30/100 (Generally Democratic)

Bias Analysis:
The article presents multiple perspectives, including both supportive statements from Biden's former aides and the ongoing Republican investigation. While it leans slightly towards defending Biden, it also includes potentially damaging information, maintaining a relatively balanced approach.

Key metric: Presidential Approval Rating

As a social scientist, I analyze that this article highlights the ongoing debate about President Biden's cognitive abilities and its potential impact on public perception. The testimony of former aides, particularly Anita Dunn, appears to be an attempt to counter narratives about Biden's mental fitness. The Republican-led probe and the refusal of some aides to testify suggest a politically charged atmosphere. This investigation and the associated media coverage could significantly influence public opinion on Biden's capability to lead, potentially affecting his approval ratings and re-election prospects. The emphasis on aging and cognitive abilities in high office also raises broader questions about age and leadership in American politics.

Entities mentioned:
- Joe Biden: Power, Legacy, Self-preservation
- Bruce Reed: Loyalty, Duty, Professional pride
- House Oversight Committee: Justice, Control, Righteousness
- Anita Dunn: Loyalty, Professional pride, Self-preservation
- Donald Trump: Competitive spirit, Power, Recognition
- Steve Ricchetti: Loyalty, Duty, Professional pride
- Mike Donilon: Loyalty, Professional pride, Duty
- Dr. Kevin O'Connor: Self-preservation, Professional pride, Duty
- Anthony Bernal: Self-preservation, Loyalty, Duty
- Annie Tomasini: Self-preservation, Loyalty, Duty

Article Assessment:
Credibility Score: 65/100
Bias Rating: 55/100 (Center)
Sentiment Score: 35/100
Authoritarianism Risk: 40/100 (Generally Democratic)

Bias Analysis:
The article presents a relatively balanced view, including perspectives from both Republican investigators and former Biden officials. However, there's a slight lean towards emphasizing the investigation's legitimacy and potential implications for Biden.

Key metric: Public Trust in Government

As a social scientist, I analyze that this investigation into former President Biden's cognitive abilities could significantly impact public trust in government. The probe raises questions about transparency and the fitness of elected officials, potentially eroding confidence in the political system. The involvement of high-ranking officials and their varying levels of cooperation suggest a complex interplay of loyalty, self-preservation, and institutional integrity. The use of Fifth Amendment rights by some officials may further fuel public skepticism. This investigation could have long-lasting effects on how the public perceives age and mental acuity in relation to political leadership, potentially influencing future elections and policy discussions around age limits for public office.