Valid
The website in memory of Jobke, and interesting stuff about Logic

Q&A Dr. Wildman:

• YT Video Playlist Logic Lectures
• Definition of validity brackets (doesn't work atm)
• Difference "if" vs "if and only if" (doesn't work atm)

Other interesting links:

• Venn Diagram arguments & validity
• Semantic Concepts (in color)
• No Present King
• Practice FOL on GeeksForGeeks
• At Least, At Most etc (by Maureen)

More Jobke pics:

Last updated: 2021-10-25
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