1. Logically valid
   - reasoned, sound

See also: valid

• RHD
• rhea
• Rhea americana
• Rhea Silvia
• rhebok
• rhebuck
• Rheidae
• Rheiformes
• Rheims
• Rheims-Douay Bible
• Rheims-Douay Version
• Rhein
• Rheinland
• Rhenish
• rhenium
• rheologic
• rheological
• rheology
• rheometer
• rheostat
• rhesus
• rhesus factor
• rhesus monkey
• rhetoric
• rhetorical