diff --git a/tests/proofmode.ref b/tests/proofmode.ref
index 2f8b19f5551a70a18ce638b5c7406c890d08633c..4380630abc92acab89e88b746adab0638f25b947 100644
--- a/tests/proofmode.ref
+++ b/tests/proofmode.ref
@@ -553,13 +553,13 @@ Tactic failure: iStartProof: not a BI assertion.
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iPoseProof (open_constr) as (constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)",
+"iPoseProofCore (open_constr) as (constr) (tactic3)",
 "iPoseProofCoreLem (constr) as (constr) before_tc (tactic3)" and
 "<iris.proofmode.ltac_tactics.iIntoEmpValid>", last call failed.
 Tactic failure: iPoseProof: not a BI assertion.
 The command has indeed failed with message:
 In nested Ltac calls to "iPoseProof (open_constr) as (constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)",
+"iPoseProofCore (open_constr) as (constr) (tactic3)",
 "iPoseProofCoreLem (constr) as (constr) before_tc (tactic3)", 
 "tac" (bound to spec_tac ltac:(()); [ .. | tac Htmp ]), 
 "tac" (bound to spec_tac ltac:(()); [ .. | tac Htmp ]), 
@@ -573,14 +573,14 @@ Tactic failure: iRename: "H" not fresh.
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iPoseProof (open_constr) as (constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)" and
+"iPoseProofCore (open_constr) as (constr) (tactic3)" and
 "iPoseProofCoreHyp (constr) as (constr)", last call failed.
 Tactic failure: iPoseProof: "Hx" not found.
 "iPoseProof_not_found_fail2"
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iPoseProof (open_constr) as (constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)",
+"iPoseProofCore (open_constr) as (constr) (tactic3)",
 "iPoseProofCoreLem (constr) as (constr) before_tc (tactic3)", 
 "tac" (bound to spec_tac ltac:(()); [ .. | tac Htmp ]), 
 "tac" (bound to spec_tac ltac:(()); [ .. | tac Htmp ]), 
@@ -648,7 +648,7 @@ Tactic failure: iOrDestruct: "H1" or "H'" not fresh.
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iApply (open_constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)", 
+"iPoseProofCore (open_constr) as (constr) (tactic3)", 
 "tac" (bound to fun H => iApplyHyp H) and "iApplyHyp (constr)", last call
 failed.
 Tactic failure: iApply: cannot apply P.
@@ -656,7 +656,7 @@ Tactic failure: iApply: cannot apply P.
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iApply (open_constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)", 
+"iPoseProofCore (open_constr) as (constr) (tactic3)", 
 "tac" (bound to fun H => iApplyHyp H) and "iApplyHyp (constr)", last call
 failed.
 Tactic failure: iApply: Q
@@ -665,7 +665,7 @@ not absorbing and the remaining hypotheses not affine.
      : string
 The command has indeed failed with message:
 In nested Ltac calls to "iApply (open_constr)",
-"iPoseProofCore (open_constr) as (constr) (constr) (tactic3)", 
+"iPoseProofCore (open_constr) as (constr) (tactic3)", 
 "tac" (bound to fun H => iApplyHyp H) and "iApplyHyp (constr)", last call
 failed.
 Tactic failure: iApply: Q
diff --git a/theories/heap_lang/proofmode.v b/theories/heap_lang/proofmode.v
index fb2fe05141daf4ee990b5b2833584d0ad9405f1e..463d19783dc45c1f9186153064a24fdb358b223e 100644
--- a/theories/heap_lang/proofmode.v
+++ b/theories/heap_lang/proofmode.v
@@ -396,7 +396,7 @@ End heap.
 happens *after* [tac H] got executed. *)
 Tactic Notation "wp_apply_core" open_constr(lem) tactic(tac) :=
   wp_pures;
-  iPoseProofCore lem as false true (fun H =>
+  iPoseProofCore lem as false (fun H =>
     lazymatch goal with
     | |- envs_entails _ (wp ?s ?E ?e ?Q) =>
       reshape_expr e ltac:(fun K e' =>
diff --git a/theories/proofmode/ltac_tactics.v b/theories/proofmode/ltac_tactics.v
index 15fb921b797d30c6ce9d97e8e00e6655be2e297f..da4a2ec53d4700a51af85daa72cd2bdac2e80ad4 100644
--- a/theories/proofmode/ltac_tactics.v
+++ b/theories/proofmode/ltac_tactics.v
@@ -992,30 +992,15 @@ Tactic Notation "iSpecialize" open_constr(t) :=
 Tactic Notation "iSpecialize" open_constr(t) "as" "#" :=
   iSpecializeCore t as true.
 
-(** The tactic [iPoseProofCore lem as p lazy_tc tac] inserts the resource
+(** The tactic [iPoseProofCore lem as p tac] inserts the resource
 described by [lem] into the context. The tactic takes a continuation [tac] as
 its argument, which is called with a temporary fresh name [H] that refers to
 the hypothesis containing [lem].
 
-There are a couple of additional arguments:
-
-- The argument [p] is like that of [iSpecialize]. It is a Boolean that denotes
-  whether the conclusion of the specialized term [lem] is persistent.
-- The argument [lazy_tc] denotes whether type class inference on the premises
-  of [lem] should be performed before (if [lazy_tc = false]) or after (if
-  [lazy_tc = true]) [tac H] is called.
-
-Both variants of [lazy_tc] are used in other tactics that build on top of
-[iPoseProofCore]:
-
-- The tactic [iApply] uses lazy type class inference (i.e. [lazy_tc = true]),
-  so that evars can first be matched against the goal before being solved by
-  type class inference.
-- The tactic [iDestruct] uses eager type class inference (i.e. [lazy_tc = false])
-  because it may be not possible to eliminate logical connectives before all
-  type class constraints have been resolved. *)
+The argument [p] is like that of [iSpecialize]. It is a Boolean that denotes
+whether the conclusion of the specialized term [lem] is persistent. *)
 Tactic Notation "iPoseProofCore" open_constr(lem)
-    "as" constr(p) constr(lazy_tc) tactic3(tac) :=
+    "as" constr(p) tactic3(tac) :=
   iStartProof;
   let Htmp := iFresh in
   let t := lazymatch lem with ITrm ?t ?xs ?pat => t | _ => lem end in
@@ -1078,7 +1063,7 @@ Tactic Notation "iApplyHyp" constr(H) :=
      end].
 
 Tactic Notation "iApply" open_constr(lem) :=
-  iPoseProofCore lem as false true (fun H => iApplyHyp H).
+  iPoseProofCore lem as false (fun H => iApplyHyp H).
 
 (** * Disjunction *)
 Tactic Notation "iLeft" :=
@@ -1737,7 +1722,7 @@ Tactic Notation "iDestructCore" open_constr(lem) "as" constr(p) tactic3(tac) :=
      (which cannot be kept). *)
      iStartProof;
      lazymatch ident with
-     | None => iPoseProofCore lem as p false tac
+     | None => iPoseProofCore lem as p tac
      | Some ?H =>
         lazymatch iTypeOf H with
         | None =>
@@ -1746,7 +1731,7 @@ Tactic Notation "iDestructCore" open_constr(lem) "as" constr(p) tactic3(tac) :=
         | Some (true, ?P) =>
            (* intuitionistic hypothesis, check for a CopyDestruct instance *)
            tryif (let dummy := constr:(_ : CopyDestruct P) in idtac)
-           then (iPoseProofCore lem as p false tac)
+           then (iPoseProofCore lem as p tac)
            else (iSpecializeCore lem as p; [..| tac H])
         | Some (false, ?P) =>
            (* spatial hypothesis, cannot copy *)
@@ -1804,49 +1789,49 @@ Tactic Notation "iDestruct" open_constr(lem) "as" "%" simple_intropattern(pat) :
   iDestructCore lem as true (fun H => iPure H as pat).
 
 Tactic Notation "iPoseProof" open_constr(lem) "as" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1) ")"
     constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4) ")"
     constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) simple_intropattern(x6) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) simple_intropattern(x6) simple_intropattern(x7) ")"
     constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) simple_intropattern(x6) simple_intropattern(x7)
     simple_intropattern(x8) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) simple_intropattern(x6) simple_intropattern(x7)
     simple_intropattern(x8) simple_intropattern(x9) ")" constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 x9 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 x9 ) pat).
 Tactic Notation "iPoseProof" open_constr(lem) "as" "(" simple_intropattern(x1)
     simple_intropattern(x2) simple_intropattern(x3) simple_intropattern(x4)
     simple_intropattern(x5) simple_intropattern(x6) simple_intropattern(x7)
     simple_intropattern(x8) simple_intropattern(x9) simple_intropattern(x10) ")"
     constr(pat) :=
-  iPoseProofCore lem as pat false (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 ) pat).
+  iPoseProofCore lem as pat (fun H => iDestructHyp H as ( x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 ) pat).
 
 (** * Induction *)
 (* An invocation of [iInduction (x) as pat IH forall (x1...xn) Hs] will
@@ -2206,7 +2191,7 @@ Local Ltac iRewriteFindPred :=
   end.
 
 Local Tactic Notation "iRewriteCore" constr(lr) open_constr(lem) :=
-  iPoseProofCore lem as true true (fun Heq =>
+  iPoseProofCore lem as true (fun Heq =>
     eapply (tac_rewrite _ Heq _ _ lr);
       [pm_reflexivity ||
        let Heq := pretty_ident Heq in
@@ -2221,7 +2206,7 @@ Tactic Notation "iRewrite" open_constr(lem) := iRewriteCore Right lem.
 Tactic Notation "iRewrite" "-" open_constr(lem) := iRewriteCore Left lem.
 
 Local Tactic Notation "iRewriteCore" constr(lr) open_constr(lem) "in" constr(H) :=
-  iPoseProofCore lem as true true (fun Heq =>
+  iPoseProofCore lem as true (fun Heq =>
     eapply (tac_rewrite_in _ Heq _ _ H _ _ lr);
       [pm_reflexivity ||
        let Heq := pretty_ident Heq in