12/28/20
Roll your own derivations
You may have derivations of your own that you wish to try. Just type, paste, or drag and drop, them into the panel, select your derivation, and click 'Start from selection'.
[Often copy-and-paste won't work directly from a Web Page; however, usually drag-and-drop will work!]
You will need to use the correct logical symbols. Here they are
F ∴ F ∧ G ∼ ∧ ∨ ⊃ ≡ ∀ ∃ ∴
And the right syntax (the premises separated by commas and then a 'therefore' followed by the conclusion).
So, a selection needs to have a form similar to this
F⊃G,G⊃H∴F⊃H
Type, paste, or drag and drop, text into the journal, select your derivation, and click 'Start from selection'. [Often copy-and-paste won't work directly from a Web Page; however, usually drag-and-drop will work!]
You will need to use the correct logical symbols. Use the palette above or
∼ ∧ ∨ ⊃ ≡ ∀ ∃ ∴
And the right syntax (the premises separated by commas and then a '∴' followed by the conclusion).
So, a selection needs to have a form similar to this
F⊃G,G⊃H∴F⊃H
Should you wish to use the Deriver application for this, see Exercises for Easy Deriver using the Deriver Web Application [Gentzen] . Good advice is: start these tutorials without it, but if you get to the point of wishing to save some work, then switch to the Deriver Web Application.
Then ... either copy and paste the above formulas into the Journal or use the Deriver File Menu to Open from URL... with this address https://softoption.us/test/Deriver/CombinedTutorialsGentzen.html .
Preferences
You will need to set some Preferences for this.
- set identity to true (and that will give you the identity rules)
- set setTheory to true (to get set theories)
- set firstOrder to true (to get first order theories)
- and you can check that the parser is set to gentzen.