diff --git a/table.tsv b/table.tsv
index 431b947..0ba456e 100644
--- a/table.tsv
+++ b/table.tsv
@@ -952,8 +952,8 @@ Is,/∘⍳∘≢Y	Moving width-Is window of indices for array Y	Tacit	Dyadic Fun
 ∘.≤⍨∘⍳Js	Upper triangular matrix with diagonal: Js by Js	Tacit	Monadic Function		Boolean/Logical	triangle NE northeast north-east table	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQedczQe9S55FHvCiDrUe9mBdP//wE	
 ∘.≥⍨∘⍳Js	Lower triangular matrix with diagonal: Js by Js	Tacit	Monadic Function		Boolean/Logical	triangle SW southwest south-west table	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQedczQe9S59FHvCiDrUe9mBdP//wE	
 ∘.>⍨∘⍳Js	Lower triangular matrix without diagonal: Js by Js	Tacit	Monadic Function		Boolean/Logical	triangle SW southwest south-west table remove strict removing erasing erase eliminate eliminating delete deleting	https://tio.run/##SyzI0U2pTMzJT////1Hf1EdtExQedczQs3vUuwJIP@rdrGD6/z8A	
-M(⊢×1-⊣)N	Probabilistic converse nonimplication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance ⇍ Mpq		
-M(⊣×1-⊢)N	Probabilistic nonimplication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance abjunction ⇏ not butnot Lpq		
+M(⊢-×)N	Probabilistic converse nonimplication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance ⇍ Mpq		
+M(⊣-×)N	Probabilistic nonimplication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance abjunction ⇏ not butnot Lpq		
 A(⊢ׯ1*⊣)N	Conditional elementwise change of sign	Tacit	Dyadic Function		Mathematical	signum conditionalnegation changing converting conversion		
 M(⊣+¯11○⊢)N	Join real part M and imaginary part N to form complex	Tacit	Dyadic Function		Mathematical	complexnumber re() im() values combine ⌾ cartesian rectangular ⊕		
 M(⊣ׯ12○⊢)N	Join magnitude M and radians N to form complex	Tacit	Dyadic Function		Data Conversion	complexnumber polar angle absolute values combine converting change changing ⊗		
@@ -1038,8 +1038,8 @@ Xv{+/⍵}⌸Nv	Sum Nv by buckets Xv (⍴Nv ↔ ⍴Xv)	Tacit	Dyadic Function		Mat
 (~∘' ')Dv	Remove blanks in string	Tacit	Monadic Function		Text	deletespaces spaces drop without removing erasing erase eliminate eliminating delete deleting		
 Xv{⍉↑⍺⍵}Yv	Two-column matrix from two vectors (pad shorter vector)	Tacit	Monadic Function		Structural	table lists		
 Xv∘.{⍺⍵}Yv	Catalogue of all pairs from Xv and Yv	Tacit	Dyadic Function		Structural	pairings tuples table matrix		
-M(1-⊢×1-⊣)N	Probabilistic converse implication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance because ∵ ⇐ if converseconditional Bpq reverseimplying		
-M(1-⊣×1-⊢)N	Probabilistic implication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance materialconditional materialconsequence implies implying materialimplication therefore ∴ ⇒ Cpq		
+M(1+×-⊢)N	Probabilistic converse implication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance because ∵ ⇐ if converseconditional Bpq reverseimplying		
+M(1+×-⊣)N	Probabilistic implication	Tacit	Dyadic Function		Mathematical	fuzzy probability chance materialconditional materialconsequence implies implying materialimplication therefore ∴ ⇒ Cpq		
 (1≡≡∧⍬≡⍴)Y	Is Y an object representation (⎕OR)?	Tacit	Monadic Function	Array Properties	System	⎕OR? nounified? package?	https://tio.run/##SyzI0U2pTMzJT///3y0//1HbhOpHvbu0H/VureV61DcVyNcwfNS5EIQ6lj/qXQNi9G7RBEr5BakDNagTUOUPUfX/PwA	
 M(12○⊣+0J1×⊢)N	2-argument arctangent (M:x, N:y)	Tacit	Dyadic Function		Mathematical	atan2() arctan2() atn2() arctn2() atng2() arctng2()		
 Is(⊣↑1⍴⍨⊢)Js	Prefix Vector: length Is with Js ones on the left, the rest zeroes	Tacit	Dyadic Function		Boolean/Logical	1s 0s zeros Is⍺Js falses falsehoods trues truths		
@@ -1237,7 +1237,7 @@ Mv(+.×⍨÷1⊥⊣)Nm	Weighted average of rows of Nm with weights Mv	Tacit	Dyad
 Iv(,⌿1+⊢⊤¯1+⊣)Jv	Indices of Iv'th elements in ravel order of an array of dimensions Jv	Tacit	Dyadic Function		Index Generation	ravelorderindex cells items axes		
 Iv Jv⍕⍨∘(∊,⍤0/)N	Formatting N with Jv decimals in fields of width Iv	Tacit	Dyadic Function		Text	widths string		
 (+/2 1∘⊃∘⎕VFI⍤1)Dm	Sum of numbers in character matrix Dm	Tacit	Monadic Function		Data Conversion	table converting change changing		
-M(1-×⍥(1∘-))N	Probabilistic OR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance disjunction vel alternation Apq		
+M(+-×)N	Probabilistic OR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance disjunction vel alternation Apq		
 (⍋(≢,⊂)¨)Yv	Ascending shortlex grade	Tacit	Monadic Function		Mathematical	radix length-lexicographic lengthlexicographic military genealogical		
 (⍒(≢,⊂)¨)Yv	Descending shortlex grade	Tacit	Monadic Function		Mathematical	radix length-lexicographic lengthlexicographic military genealogical ordering sorting		
 (,[0.5]∘'¯')Dv	Underlines a string (1=⎕IO)	Tacit	Monadic Function		Text	underscore		
@@ -1418,7 +1418,7 @@ Iv(⊢∘≢≥∘⍋⊢∘⍳∘≢,⊣)Y	Expansion vector for Y with zeros aft
 (⊃∘.×3∘⊃∘.*⍨1+2∘⊃)N	Compound interest for principals N[1] at rates N[2] in times N[3]	Tacit	Monadic Function		Mathematical	values table matrix		
 0.5∘(⊣*⍨+.××.-0,⊢)N	Area of triangle with side lengths N	Tacit	Monadic Function		Circular/Trigonometric	Heron's formula herons		
 (0=10|1⊥∘,0 10⊤⊢×∘⌽1 2⍴⍨≢)Jv	Valid credit card?	Tacit	Monadic Function		Mathematical	testif luhns luhn's formula debitcard? creditcard? checksum valid?		
-M((1-⊣×1-⊢)×1-⊢×1-⊣)N	Probabilistic XNOR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance materialbiconditional biimplication eqv nxor bothorneither exclusivenor materialequivalence ⇔ δ ẟ Kroneckerdelta iff logicalequivalence Epq doubleimplying		
+M((1+×-⊣)×1+×-⊢)N	Probabilistic XNOR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance materialbiconditional biimplication eqv nxor bothorneither exclusivenor materialequivalence ⇔ δ ẟ Kroneckerdelta iff logicalequivalence Epq doubleimplying		
 Xs(1↓,⊢⍤/⍨1(⊢∨⌽)0,≠)Yv	Remove leading, multiple and trailing Xs's	Tacit	Dyadic Function		Selection	trim left right spaces consecutive blanks start beginning ending removing erasing erase eliminate eliminating delete deleting		
 ((1,⍨⍪)⊢⍤/⍥,⍪,~)Bv	Expansion vector (left argument for \ or ⍀) to insert a new element after each one in Bv	Tacit	Monadic Function		Structural	expand openup major cells rows items lists		
 Is(⊣,⊣-∘(⍳∘|××)-)Js	Consecutive integers from Is to Js (descending if Is>Js)	Tacit	Dyadic Function		Mathematical	arithmetic progression sequence inclusiverange seq() sequence … ... values between		
@@ -1428,7 +1428,7 @@ X(⊂⍤⍋⍤∊⍨⍥(⊂⍤¯1)⌷⊢)Y	Move items X to end of Y	Tacit	Dyadic
 (-1⊥2(⍟×⊢)⊢∘≢⌸÷≢)Y	Shannon entropy of array ⍵	Tacit	Monadic Function		Mathematical	informationtheory text message string		
 Ms(0j1⊥⊣(⊢×<∘|)11 9∘.○⊢)N	Null near-zero (within absolute distance Ms) real and imaginary parts in N	Tacit	Monadic Function		Mathematical	zero-out 0-out remove eliminate arithmetic near-zeros near-zeroes near-0s set small tiny fuzz tolerance tolerant ⎕CT almost values complex numbers part near-real near-imaginary		
 (⌊10⍟⊢÷⍨∘⍎'.'~⍨⍕)Nv	Number of decimals of elements of Nv	Tacit	Monadic Function		Mathematical	digits cells items		
-M((1-×)×1-(1-⊣)×1-⊢)N	Probabilistic XOR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance exclusivedisjunction eor exor ⊕ ⊻ ⇎ Jpq		
+M((⊣-×)(+-×)(⊢-×))N	Probabilistic XOR	Tacit	Dyadic Function		Mathematical	fuzzy probability chance exclusivedisjunction eor exor ⊕ ⊻ ⇎ Jpq		
 Is{(+/∘∪⊢∨⍳)⍣⍺⊢⍵}Js	Is'th number in the Aliqout sequence for Js	Tacit	Dyadic Function		Mathematical			
 (⊢,[0.5]'¯'\⍨≠∘' ')Dv	Underlines non-blanks in a string	Tacit	Monadic Function		Text	wordunderlinewords wordunderscorewords		
 M(⊢∘××⊣×∘⌈¯0.5+∘|÷⍨)N	Rounding N to nearest M (favouring towards 0)	Tacit	Dyadic Function		Mathematical	precision favoring