Falsity often relates to incorrect information that can be disproved by facts. The falsity of his alibi was exposed when the CCTV footage came to light.
Pro Tip 2/3
False Not Fake
Falsity refers to untruthfulness, not imitation or counterfeit like 'fake' might. They argued over the falsity of the data, not its authenticity.
Pro Tip 3/3
Serious Context
Use 'falsity' in serious or formal discussions, not in casual talks. The committee debated the falsity of the financial report.